diff --git a/crates/server/src/head_drop.rs b/crates/server/src/head_drop.rs
index 7473228..f85c1b2 100644
--- a/crates/server/src/head_drop.rs
+++ b/crates/server/src/head_drop.rs
@@ -12,7 +12,7 @@ use shared::{
     player::Player,
     protocol::{GltfSceneRoot, PlaySound},
     utils::{
-        billboards::Billboard, one_shot_force::OneShotForce, squish_animation::SquishAnimation,
+        billboards::Billboard, one_shot_force::OneShotImpulse, squish_animation::SquishAnimation,
     },
 };
 use std::f32::consts::PI;
@@ -28,15 +28,9 @@ fn on_head_drop(
     time: Res<Time>,
 ) -> Result<(), BevyError> {
     let drop = trigger.event();
-    let should_impulse = drop.impulse;
 
     let angle = rand::random::<f32>() * PI * 2.;
-    let spawn_dir = Quat::from_rotation_y(angle) * Vec3::new(0.5, 0.6, 0.).normalize();
-    let spawn_force = if should_impulse {
-        spawn_dir * 180.0 / time.delta_secs()
-    } else {
-        Vec3::ZERO
-    };
+    let spawn_impulse = Quat::from_rotation_y(angle) * Vec3::new(0.5, 0.6, 0.).normalize() * 180.;
 
     if drop.impulse {
         commands.server_trigger(ToClients {
@@ -55,11 +49,8 @@ fn on_head_drop(
             Collider::sphere(1.5),
             LockedAxes::ROTATION_LOCKED,
             RigidBody::Dynamic,
-            OneShotForce(spawn_force),
-            CollisionLayers::new(
-                GameLayer::CollectiblePhysics,
-                LayerMask::ALL & !GameLayer::Player.to_bits(),
-            ),
+            OneShotImpulse(spawn_impulse),
+            CollisionLayers::new(GameLayer::CollectiblePhysics, GameLayer::Level),
             Restitution::new(0.6),
             Children::spawn(SpawnWith({
                 let head_id = drop.head_id;
diff --git a/crates/shared/src/head_drop.rs b/crates/shared/src/head_drop.rs
index 7cc915b..63d3f7e 100644
--- a/crates/shared/src/head_drop.rs
+++ b/crates/shared/src/head_drop.rs
@@ -48,6 +48,10 @@ pub struct HeadCollected {
 }
 
 pub fn plugin(app: &mut App) {
+    app.register_type::<HeadDrop>();
+    app.register_type::<HeadDropEnableTime>();
+    app.register_type::<SecretHeadMarker>();
+
     app.add_systems(
         Update,
         enable_collectible.run_if(in_state(GameState::Playing)),
diff --git a/crates/shared/src/keys.rs b/crates/shared/src/keys.rs
index bddc38c..446e4ad 100644
--- a/crates/shared/src/keys.rs
+++ b/crates/shared/src/keys.rs
@@ -5,7 +5,7 @@ use crate::{
     player::Player,
     protocol::{GltfSceneRoot, PlaySound},
     squish_animation::SquishAnimation,
-    utils::one_shot_force::OneShotForce,
+    utils::one_shot_force::OneShotImpulse,
 };
 use avian3d::prelude::*;
 use bevy::prelude::*;
@@ -26,14 +26,13 @@ pub fn plugin(app: &mut App) {
     global_observer!(app, on_spawn_key);
 }
 
-fn on_spawn_key(trigger: On<KeySpawn>, mut commands: Commands, time: Res<Time<Fixed>>) {
+fn on_spawn_key(trigger: On<KeySpawn>, mut commands: Commands) {
     let KeySpawn(position, id) = trigger.event();
 
     let id = id.clone();
 
     let angle = rand::random::<f32>() * PI * 2.;
-    let spawn_dir = Quat::from_rotation_y(angle) * Vec3::new(0.5, 0.6, 0.).normalize();
-    let spawn_force = spawn_dir * 180.0 / time.delta_secs();
+    let spawn_force = Quat::from_rotation_y(angle) * Vec3::new(0.5, 0.6, 0.).normalize() * 180.;
 
     commands
         .spawn((
@@ -44,7 +43,7 @@ fn on_spawn_key(trigger: On<KeySpawn>, mut commands: Commands, time: Res<Time<Fi
             Collider::sphere(1.5),
             LockedAxes::ROTATION_LOCKED,
             RigidBody::Dynamic,
-            OneShotForce(spawn_force),
+            OneShotImpulse(spawn_force),
             CollisionLayers::new(GameLayer::CollectiblePhysics, GameLayer::Level),
             Restitution::new(0.6),
             Replicated,
diff --git a/crates/shared/src/utils/one_shot_force.rs b/crates/shared/src/utils/one_shot_force.rs
index 68c3636..c0d75d5 100644
--- a/crates/shared/src/utils/one_shot_force.rs
+++ b/crates/shared/src/utils/one_shot_force.rs
@@ -6,14 +6,14 @@ pub fn plugin(app: &mut App) {
 }
 
 #[derive(Component)]
-pub struct OneShotForce(pub Vec3);
+pub struct OneShotImpulse(pub Vec3);
 
 pub fn apply_one_shot_forces(
     mut commands: Commands,
-    mut query: Query<(Entity, &OneShotForce, Forces)>,
+    mut query: Query<(Entity, &OneShotImpulse, Forces)>,
 ) {
     for (entity, force, mut forces) in query.iter_mut() {
-        forces.apply_force(force.0);
-        commands.entity(entity).remove::<OneShotForce>();
+        forces.apply_linear_impulse(force.0);
+        commands.entity(entity).remove::<OneShotImpulse>();
     }
 }