diff --git a/core/src/events.rs b/core/src/events.rs
index a644be65..c4f59320 100644
--- a/core/src/events.rs
+++ b/core/src/events.rs
@@ -106,13 +106,13 @@ impl CollisionData {
         rigid_body_entity: Entity,
         collision_shape_entity: Entity,
         collision_layers: CollisionLayers,
-        normals: SmallVec<[Vec2; 1]>,
+        normals: impl IntoIterator<Item = Vec2>,
     ) -> Self {
         Self {
             rigid_body_entity,
             collision_shape_entity,
             collision_layers,
-            normals,
+            normals: normals.into_iter().collect(),
         }
     }
 
diff --git a/rapier/src/pipeline.rs b/rapier/src/pipeline.rs
index 2f281cc3..d35a3f67 100644
--- a/rapier/src/pipeline.rs
+++ b/rapier/src/pipeline.rs
@@ -476,30 +476,24 @@ impl EventManager {
                 collider1.parent().and_then(|parent| bodies.get(parent)),
                 collider2.parent().and_then(|parent| bodies.get(parent)),
             ) {
-                let normals1 = narrow_phase
-                    .contact_pair(h1, h2)
-                    .map(|contact_pair| {
-                        contact_pair
-                            .manifolds
-                            .iter()
-                            .map(|manifold| {
+                let normals1 =
+                    narrow_phase
+                        .contact_pair(h1, h2)
+                        .into_iter()
+                        .flat_map(|contact_pair| {
+                            contact_pair.manifolds.iter().map(|manifold| {
                                 Vec2::new(manifold.data.normal.x, manifold.data.normal.y)
                             })
-                            .collect()
-                    })
-                    .unwrap_or_default();
-                let normals2 = narrow_phase
-                    .contact_pair(h2, h1)
-                    .map(|contact_pair| {
-                        contact_pair
-                            .manifolds
-                            .iter()
-                            .map(|manifold| {
+                        });
+                let normals2 =
+                    narrow_phase
+                        .contact_pair(h2, h1)
+                        .into_iter()
+                        .flat_map(|contact_pair| {
+                            contact_pair.manifolds.iter().map(|manifold| {
                                 Vec2::new(manifold.data.normal.x, manifold.data.normal.y)
                             })
-                            .collect()
-                    })
-                    .unwrap_or_default();
+                        });
 
                 let d1 = CollisionData::new(
                     Entity::from_bits(rb1.user_data as u64),