diff --git a/src/game/Entities/Vehicle.cpp b/src/game/Entities/Vehicle.cpp
index 570eca580a5..f274450c768 100644
--- a/src/game/Entities/Vehicle.cpp
+++ b/src/game/Entities/Vehicle.cpp
@@ -495,7 +495,8 @@ uint8 VehicleInfo::GetTakenSeatsMask() const
 
 bool VehicleInfo::IsUsableSeatForPlayer(uint32 seatFlags, uint32 seatFlagsB) const
 {
-    return seatFlags & SEAT_FLAG_CAN_EXIT ||
+    return seatFlags & (SEAT_FLAG_HAS_ENTER_ANIM | SEAT_FLAG_HAS_RIDE_ANIM) ||
+           seatFlags & SEAT_FLAG_CAN_EXIT ||
            seatFlags & SEAT_FLAG_UNCONTROLLED ||
            seatFlagsB &
            (SEAT_FLAG_B_USABLE_FORCED   | SEAT_FLAG_B_USABLE_FORCED_2 |
diff --git a/src/game/Server/DBCEnums.h b/src/game/Server/DBCEnums.h
index 9cf421e1209..d3f21fab323 100644
--- a/src/game/Server/DBCEnums.h
+++ b/src/game/Server/DBCEnums.h
@@ -502,19 +502,19 @@ enum VehicleFlags
 
 enum VehicleSeatFlags
 {
-    SEAT_FLAG_UNK1                  = 0x00000001,           // "HasLowerAnimForEnter"
-    SEAT_FLAG_UNK2                  = 0x00000002,           // "HasLowerAnimForRide"
+    SEAT_FLAG_HAS_ENTER_ANIM        = 0x00000001,           // "HasLowerAnimForEnter"
+    SEAT_FLAG_HAS_RIDE_ANIM         = 0x00000002,           // "HasLowerAnimForRide"
     SEAT_FLAG_UNK3                  = 0x00000004,
     SEAT_FLAG_UNK4                  = 0x00000008,           // "ShouldUseVehicleSeatExitAnimationOnVoluntaryExit"
     SEAT_FLAG_UNK5                  = 0x00000010,
     SEAT_FLAG_UNK6                  = 0x00000020,
     SEAT_FLAG_UNK7                  = 0x00000040,
     SEAT_FLAG_UNK8                  = 0x00000080,
-    SEAT_FLAG_UNK9                  = 0x00000100,
+    SEAT_FLAG_UNK9                  = 0x00000100,           // Note: only 5 seats are available with this flag in 3.3.5a; found only on flying dragons and harpoon guns
     SEAT_FLAG_HIDE_PASSENGER        = 0x00000200,           // Passenger is hidden
-    SEAT_FLAG_UNK10                 = 0x00000400,           // "AllowsTurning"
+    SEAT_FLAG_ALLOW_TURNING         = 0x00000400,           // "AllowsTurning" | Note: allows the passenger to turn (change orientation) while boarded
     SEAT_FLAG_CAN_CONTROL           = 0x00000800,           // Lua_UnitInVehicleControlSeat
-    SEAT_FLAG_UNK11                 = 0x00001000,           // "Can Cast Mount Spell"
+    // SEAT_FLAG_UNK11              = 0x00001000,           // "Can Cast Mount Spell" | Note: there are no seats with this flag in 3.3.5a
     SEAT_FLAG_UNCONTROLLED          = 0x00002000,           // "Uncontrolled"
     SEAT_FLAG_CAN_ATTACK            = 0x00004000,           // Can attack, cast spells and use items from vehicle?
     SEAT_FLAG_UNK13                 = 0x00008000,           // "ShouldUseVehicleSeatExitAnimationOnForcedExit"
@@ -523,9 +523,9 @@ enum VehicleSeatFlags
     SEAT_FLAG_UNK16                 = 0x00040000,           // "HasVehicleExitAnimForVoluntaryExit"
     SEAT_FLAG_UNK17                 = 0x00080000,           // "HasVehicleExitAnimForForcedExit"
     SEAT_FLAG_NOT_SELECTABLE        = 0x00100000,
-    SEAT_FLAG_UNK19                 = 0x00200000,
+    SEAT_FLAG_UNK19                 = 0x00200000,           // Note: only 4 seats are available with this flag in 3.3.5a; found only on flying dragons
     SEAT_FLAG_UNK20                 = 0x00400000,           // "RecHasVehicleEnterAnim"
-    SEAT_FLAG_UNK21                 = 0x00800000,           // Lua_IsUsingVehicleControls
+    // SEAT_FLAG_UNK21              = 0x00800000,           // Lua_IsUsingVehicleControls | Note: there are no seats with this flag in 3.3.5a
     SEAT_FLAG_UNK22                 = 0x01000000,           // "EnableVehicleZoom"
     SEAT_FLAG_CAN_EXIT              = 0x02000000,           // Lua_CanExitVehicle
     SEAT_FLAG_CAN_SWITCH            = 0x04000000,           // Lua_CanSwitchVehicleSeats
@@ -543,7 +543,7 @@ enum VehicleSeatFlagsB
     SEAT_FLAG_B_EJECTABLE           = 0x00000020,           // Ejectable
     SEAT_FLAG_B_USABLE_FORCED_2     = 0x00000040,
     SEAT_FLAG_B_USABLE_FORCED_3     = 0x00000100,
-    SEAT_FLAG_B_KEEP_PET            = 0x00020000,
+    // SEAT_FLAG_B_KEEP_PET         = 0x00020000,           // Note: there are no seats with this flag in 3.3.5a
     SEAT_FLAG_B_USABLE_FORCED_4     = 0x02000000,
     SEAT_FLAG_B_CAN_SWITCH          = 0x04000000,
     SEAT_FLAG_B_PLAYERFRAME_UI      = 0x80000000            // Lua_UnitHasVehiclePlayerFrameUI