diff --git a/csqc/pmove.qc b/csqc/pmove.qc
index 76fff3cd..6a6edfdf 100644
--- a/csqc/pmove.qc
+++ b/csqc/pmove.qc
@@ -239,8 +239,9 @@ static void PM_ActivatePMS(PMS_Data *pmsd) {
     pm.ent.pmove_flags = 0;  // With auto-bunny we only care about clearing
 };
 
+static float cache_invalidated;
 static PMS_Data* SimPMSD() {
-    return CVARF(fopm_nocache) ? &pm_s : &pm_c;
+    return (cache_invalidated || CVARF(fopm_nocache)) ? &pm_s : &pm_c;
 }
 
 void PM_InputFrame();
@@ -250,6 +251,7 @@ enum {
     NT_CONC,
     NT_DASH,
     NT_EXPLOSION,
+    NT_BOUNCE,
 };
 
 enum {
@@ -257,6 +259,7 @@ enum {
     NA_SEQ,
     NA_SEQTIME,
     NA_ITIME,
+    NA_CONC,  // itime but with expiration driven by conc_state
 };
 
 struct PM_Nudge {
@@ -271,6 +274,7 @@ struct PM_Nudge {
     float aux;
 };
 
+const static float NUDGE_EPS = 3 * SERVER_FRAME_DT;
 static PM_Nudge nudges[5];
 static float num_nudges;
 
@@ -281,9 +285,10 @@ static float nudge_expired(PM_Nudge* n) {
 
     switch (n->nat) {
         case NA_NONE: return TRUE;
-        case NA_SEQ: return n->seq < servercommandframe;
-        case NA_SEQTIME: return n->seq + ceil(n->itime / SERVER_FRAME_DT) < servercommandframe;
-        case NA_ITIME: return n->itime < pstate_server.server_time;
+        case NA_SEQ: return n->seq >= servercommandframe;
+        case NA_SEQTIME: return n->seq + ceil(n->itime / SERVER_FRAME_DT) >= servercommandframe;
+        case NA_ITIME: return n->itime >= pstate_server.server_time + NUDGE_EPS;  // Slack
+        case NA_CONC: return n->itime <= pstate_server.conc_state.next;
     }
 
     return TRUE;
@@ -296,6 +301,7 @@ static PM_Nudge* find_nudge_slot() {
         if (!nudge_expired(n))
             continue;
 
+        cache_invalidated = TRUE;
         n->nat = NA_NONE;
         n->src_no = 0;
         n->src = 0;
@@ -330,6 +336,7 @@ void PM_AddNudgeConc(float itime, float mag, float flip) {
         return;
 
     n->type = NT_CONC;
+    n->nat = NA_CONC;
     n->itime = itime;
     n->vec.x = mag;
     n->vec.y = flip;
@@ -381,7 +388,7 @@ static void PM_NudgeExplosion(PM_Nudge* nudge, entity ent) {
 
 // Can be either by {seq + itime} for predicted projectiles, or by {itime} for
 // server projectiles.
-void PM_AddNudgeExplosion(float nat, float seq, float itime, entity ent, float dmg) {
+static void PM_AddNudgeExplosion(float nat, float seq, float itime, entity ent, float dmg) {
     if (vlen(PM_Org() - ent.origin) > dmg * 3)  // Fine tune this..
         return;
 
@@ -400,11 +407,58 @@ void PM_AddNudgeExplosion(float nat, float seq, float itime, entity ent, float d
     n->src_no = ent.entnum;
 
     ent.nudge = n;
+    ent.removefunc = PM_RemoveSelfNudges;
+}
+
+static void PM_AddNudgeBounce(float itime, entity ent, float dmg) {
+    if (vlen(PM_Org() - ent.origin) > dmg * 3)  // Fine tune this..
+        return;
 
+    PM_Nudge* n = find_nudge_slot();
+    if (!n)
+        return;
+
+    n->type = NT_BOUNCE;
+    n->nat = NA_ITIME;
+    n->itime = itime;
+    n->aux = dmg;
+
+    n->src = ent;
+    n->src_no = ent.entnum;
+
+    ent.nudge = n;
     ent.removefunc = PM_RemoveSelfNudges;
 }
 
-DEFCVAR_FLOAT(fo_beta_nudge_explosion, 0);
+static void PM_NudgeBounce(PM_Nudge* nudge, entity ent) {
+    float dmg = nudge->aux;
+    entity src = nudge->src;
+
+    if (vlen(ent.origin - src.origin) > dmg + 40)
+        return;
+
+    vector targ_org = ent.origin + (ent.mins + ent.maxs) * 0.5;
+    float points = dmg - vlen(targ_org - src.origin) / 2;
+
+    ent.velocity = (targ_org - src.origin) * points/20;
+}
+
+
+void PM_AddGrenadeExplosion(float itime, entity ent) {
+    if (!PM_Enabled() || !CVARF(fo_beta_nudge_explosion))
+        return;
+
+    FO_GrenExp exp;
+    FO_GrenGetExp(ent.fpp.gren_type, exp);
+
+    float dmg = exp.dmg;
+
+    if (exp.type == kRadiusDamage)
+        PM_AddNudgeExplosion(NA_ITIME, 0, itime, ent, dmg);
+    else
+        PM_AddNudgeBounce(itime, ent, dmg);
+}
+
 void PM_AddSimExplosion(float itime, entity ent) {
     if (!PM_Enabled() || !CVARF(fo_beta_nudge_explosion))
         return;
@@ -447,6 +501,7 @@ float MatchNudge(PM_Nudge* n, float seq, float sitime, float eitime) {
     switch (n->nat) {
         case NA_SEQ: return n->seq == seq;
         case NA_SEQTIME: return n->seq + floor(n->itime / SERVER_FRAME_DT) == seq;
+        case NA_CONC:
         case NA_ITIME: return n->itime > sitime && n->itime <= eitime;
         default:
             return FALSE;
@@ -454,8 +509,7 @@ float MatchNudge(PM_Nudge* n, float seq, float sitime, float eitime) {
 }
 
 // TODO: This obviously wants to be smarter
-static vector PM_ApplyNudges(entity ent, float seq, float sitime, float eitime) {
-    vector result = '0 0 0';
+static void PM_ApplyNudges(entity ent, float seq, float sitime, float eitime) {
     for (float i = 0; i < nudges.length; i++) {
         PM_Nudge* n = &nudges[i];
 
@@ -472,10 +526,11 @@ static vector PM_ApplyNudges(entity ent, float seq, float sitime, float eitime)
             case NT_EXPLOSION:
                 PM_NudgeExplosion(n, ent);
                 break;
+            case NT_BOUNCE:
+                PM_NudgeBounce(n, ent);
+                break;
         }
     }
-
-    return result;
 }
 
 static void RunPlayerPhysics() {
@@ -517,6 +572,9 @@ static void PM_RunMovement(PMS_Data* pmsd, float endframe) {
         RunPlayerPhysics();
 
         if (!CVARF(fopm_nonudge)) {
+            float start_time = pm.interp_t;
+            if (pm.seq == pm.server_seq + 1)
+                start_time -= NUDGE_EPS;
             PM_ApplyNudges(ent, pm.seq, pm.interp_t, pm.interp_t + input_timelength);
         }
 
@@ -576,7 +634,6 @@ static void PM_UpdateError() {
 
     err -= ent.origin;
     float nerr = vlen(err);
-
     if (nerr > 64) {  // teleport
         pm.error = '0 0 0';
         pm.errortime = 0;
@@ -657,6 +714,11 @@ static void PM_HandleRemovedNudges() {
         if (nudge_expired(n))
             continue;
 
+        if (n->type == NT_CONC && n->itime < pstate_server.conc_state.next) {
+            n->expire_frame = -1;
+            continue;
+        }
+
         for (float j = 0; j < pstate_server.num_filter_ents; j++) {
             if (n->src_no == pstate_server.filter_ents[j]) {
                 n->nat = NA_SEQ;
@@ -694,6 +756,7 @@ void PM_Update(float sendflags) {
         if (clientcommandframe > servercommandframe + 1)
             PM_RunMovement(&pm_s, clientcommandframe - 1);
         PM_SavePMS(&pm_c);
+        cache_invalidated = FALSE;
     }
 
     if (enabled && was_enabled)
diff --git a/csqc/weapon_predict.qc b/csqc/weapon_predict.qc
index 4ae79879..77468264 100644
--- a/csqc/weapon_predict.qc
+++ b/csqc/weapon_predict.qc
@@ -586,6 +586,8 @@ void PredProj_Sound(int proj_type, float vol = 1) {
 
 void PM_Update(float sendflags);
 
+DEFCVAR_FLOAT(fo_beta_nudge_explosion, 0);
+
 void WP_ServerUpdate(float sendflags) {
     pstate_server.seq = servercommandframe;
 
@@ -604,8 +606,8 @@ void WP_ServerUpdate(float sendflags) {
         pstate_server.weaponframe += 1;
     }
 
-    if (CVARF(fo_wpp_beta) & 4)
-        phys_sim_dt = (pstate_server.client_ping + 2 * SERVER_FRAME_MS) / 1000.0;
+    if (CVARF(fo_beta_nudge_explosion))
+        phys_sim_dt = (pstate_server.client_ping + 4 * SERVER_FRAME_MS) / 1000.0;
     else
         phys_sim_dt = -1;
 
@@ -2057,7 +2059,7 @@ static void WP_UpdatePredict() {
             pengine.is_effectframe = TRUE;
             pengine.last_effectframe = pframe;
             PM_SyncTo(pframe);
-            /* Conc_Update(&pstate_pred.conc_state, world, pstate_pred.server_time); */
+            Conc_Update(&pstate_pred.conc_state, world, pstate_pred.server_time);
         } else {
             pengine.is_effectframe = FALSE;
         }
diff --git a/share/classes.qc b/share/classes.qc
index 25048ce2..831dd0db 100644
--- a/share/classes.qc
+++ b/share/classes.qc
@@ -125,10 +125,10 @@ static inline void ConcAction(entity ent, float itime, float mag, float flip) {
     Conc_Stumble(ent, mag, flip);
 }
 #else
-void PM_AddConcNudge(float itime, float mag, float flip);
+void PM_AddNudgeConc(float itime, float mag, float flip);
 
 static inline void ConcAction(entity ent, float itime, float mag, float flip) {
-    PM_AddConcNudge(itime, mag, flip);
+    PM_AddNudgeConc(itime, mag, flip);
 }
 #endif
 
diff --git a/share/physics.qc b/share/physics.qc
index 66e887aa..f4e54746 100644
--- a/share/physics.qc
+++ b/share/physics.qc
@@ -60,6 +60,8 @@ static void Phys_Impact(entity e, float dt, float phys_flags) {
 static vector get_followed_origin() {
     return self.aiment.origin;
 }
+
+static void Phys_Expired(entity e, float phys_flags) {}
 #else
 DEFCVAR_FLOAT(fo_phys_debug, 0);
 
@@ -93,7 +95,15 @@ static void Phys_Impact(entity e, float dt, float phys_flags) {
                 get_phys_time(e));
 }
 
-static void Phys_Expired(entity e, float phys_flags) {}
+void PM_AddGrenadeExplosion(float itime, entity ent);
+
+static void Phys_Expired(entity e, float phys_flags) {
+    e.voided = TRUE;
+    if (e.phys_sim_voided_at)  // Only one of sim or !sim
+        return;
+
+    PM_AddGrenadeExplosion(e.fpp.expires_at, e);
+}
 
 static vector get_followed_origin() {
     if (!(float)getentity(self.aiment_num, GE_ACTIVE))
@@ -224,7 +234,7 @@ float Phys_Advance(entity e, float target_time, float phys_flags) {
     }
 
     // If there's an expiry, make sure we get to the exact position.
-    if (e.fpp.expires_at && target_time > e.fpp.expires_at) {
+    if (e.fpp.expires_at && target_time >= e.fpp.expires_at) {
         target_time = e.fpp.expires_at;
         phys_flags |= PHYSF_CONSUME_ALL;
     }
@@ -280,6 +290,10 @@ float Phys_Advance(entity e, float target_time, float phys_flags) {
 
     if (step > 0)  // Origin can have moved.
         setorigin(e, e.origin);
+
+    if (e.fpp.expires_at && e.phys_time >= e.fpp.expires_at)
+        Phys_Expired(e, phys_flags);
+
     return total;
 }
 
@@ -301,7 +315,7 @@ void Phys_Sim(entity e) {
         return;
 
     float ptime = time + phys_sim_dt;
-    if (ptime < self.phys_sim_last + SERVER_FRAME_MS)
+    if (ptime < self.phys_sim_last + SERVER_FRAME_DT)
         return;
     self.phys_sim_last = ptime;
 
diff --git a/share/prediction.qc b/share/prediction.qc
index bfa0d353..9aa81c13 100644
--- a/share/prediction.qc
+++ b/share/prediction.qc
@@ -51,6 +51,8 @@ enumflags {
     PF_PMOVE_ACTIVATING,
 };
 
+static float MAX_FILTER_ENTS = 4;
+
 struct predict_tf_state {
     int playerclass;
     int predict_flags, effects;
@@ -84,9 +86,9 @@ struct predict_tf_state {
 
     float num_filter_ents;
 #ifdef SSQC
-    entity filter_ents[4];
+    entity filter_ents[MAX_FILTER_ENTS];
 #else
-    float filter_ents[4];
+    float filter_ents[MAX_FILTER_ENTS];
 #endif
 
 #ifdef CSQC
@@ -398,8 +400,8 @@ void Predict_AddFilterEnt(entity p, entity filter) {
         return;
 
     predict_tf_state* ps = &p.predict_state;
-    if (ps->num_filter_ents >= 4)
-            return
+    if (ps->num_filter_ents >= MAX_FILTER_ENTS)
+            return;
     ps->filter_ents[ps->num_filter_ents++] = filter;
 }
 
diff --git a/share/weapons.qc b/share/weapons.qc
index dccb3480..8a0c09c6 100644
--- a/share/weapons.qc
+++ b/share/weapons.qc
@@ -843,7 +843,7 @@ const float KF_BOTH_PLAYER = KF_SRC_PLAYER | KF_TARG_PLAYER;
 // terrible mistake.
 
 float CalcRadiusDamage(entity src, entity targ, float flags, float damage) {
-    vector targ_origin = (targ.absmin + targ.absmax) * 0.5;  // (*)
+    vector targ_origin = targ.origin + (targ.mins + targ.maxs) * 0.5;  // (*)
     damage -= vlen(src.origin - targ_origin) / 2;
 
     if (flags & KF_SELF)
@@ -857,7 +857,7 @@ vector CalcKnock(entity src, entity targ, float flags, float moment) {
     if (moment < 60 && (flags & (KF_BOTH_PLAYER | KF_SELF) == KF_BOTH_PLAYER))
             mult = 11;
 
-    vector src_origin = (src.absmin + src.absmax) * 0.5;  // (*)
+    vector src_origin = src.origin + (src.mins + src.maxs) * 0.5;  // (*)
     vector dir = normalize(targ.origin - src_origin);
 
     vector result = dir * moment * mult;
diff --git a/ssqc/scout.qc b/ssqc/scout.qc
index 8205ea70..cd8ee594 100644
--- a/ssqc/scout.qc
+++ b/ssqc/scout.qc
@@ -858,6 +858,8 @@ void (entity inflictor, entity attacker, float bounce,
                     && (points > 0)) {
                     head.velocity = org - inflictor.origin;
                     head.velocity = head.velocity * (points / 20);
+                    Predict_AddFilterEnt(head, inflictor);
+
                     if (head.classname != "player") {
                         if (head.flags & FL_ONGROUND)
                             head.flags = head.flags - FL_ONGROUND;
diff --git a/ssqc/tfort.qc b/ssqc/tfort.qc
index 4a5035e6..8d061796 100644
--- a/ssqc/tfort.qc
+++ b/ssqc/tfort.qc
@@ -2420,6 +2420,7 @@ void () TeamFortress_ExplodePerson = {
 
     proj.fpp.gren_type = gtype;
     proj.fpp.flags |= FPF_NO_REWIND;
+    proj.fpp.expires_at = expires;
     proj.skin = gdesc->skin;
     proj.avelocity = gdesc->avelocity;
     proj.touch = ste->touch;