diff --git a/audio/sounds/cop_shoot.ogg b/audio/sounds/cop_shoot.ogg
new file mode 100644
index 0000000..d877019
Binary files /dev/null and b/audio/sounds/cop_shoot.ogg differ
diff --git a/audio/sounds/cop_shoot.ogg.import b/audio/sounds/cop_shoot.ogg.import
new file mode 100644
index 0000000..4096abd
--- /dev/null
+++ b/audio/sounds/cop_shoot.ogg.import
@@ -0,0 +1,15 @@
+[remap]
+
+importer="ogg_vorbis"
+type="AudioStreamOGGVorbis"
+path="res://.import/cop_shoot.ogg-9b313ebb8fdaa01b18fd3850d015564e.oggstr"
+
+[deps]
+
+source_file="res://audio/sounds/cop_shoot.ogg"
+dest_files=[ "res://.import/cop_shoot.ogg-9b313ebb8fdaa01b18fd3850d015564e.oggstr" ]
+
+[params]
+
+loop=false
+loop_offset=0
diff --git a/audio/sounds/shell.ogg b/audio/sounds/shell.ogg
new file mode 100644
index 0000000..22bba6c
Binary files /dev/null and b/audio/sounds/shell.ogg differ
diff --git a/audio/sounds/shell.ogg.import b/audio/sounds/shell.ogg.import
new file mode 100644
index 0000000..90fbd66
--- /dev/null
+++ b/audio/sounds/shell.ogg.import
@@ -0,0 +1,15 @@
+[remap]
+
+importer="ogg_vorbis"
+type="AudioStreamOGGVorbis"
+path="res://.import/shell.ogg-33573c264b05fde91faa4b27d4763823.oggstr"
+
+[deps]
+
+source_file="res://audio/sounds/shell.ogg"
+dest_files=[ "res://.import/shell.ogg-33573c264b05fde91faa4b27d4763823.oggstr" ]
+
+[params]
+
+loop=false
+loop_offset=0
diff --git a/autoloads/audio.gd b/autoloads/audio.gd
index df1a0e1..f3314ef 100644
--- a/autoloads/audio.gd
+++ b/autoloads/audio.gd
@@ -61,6 +61,7 @@ const a_copsquash = preload("res://audio/sounds/copsquash.ogg")
 const a_copsquash2 = preload("res://audio/sounds/cop_splat.ogg")
 const a_fami_transform = preload("res://audio/sounds/fami_transform.ogg")
 const a_ominous = preload("res://audio/sounds/ominous.ogg")
+const a_bullet_casing = preload("res://audio/sounds/shell.ogg")
 
 var loop_section = null
 var has_looped = false
diff --git a/objects/enemy/bullet_casing.gd b/objects/enemy/bullet_casing.gd
new file mode 100644
index 0000000..ea7236f
--- /dev/null
+++ b/objects/enemy/bullet_casing.gd
@@ -0,0 +1,12 @@
+extends RigidBody2D
+
+
+var has_played_sound = false
+
+
+
+func _on_BoneParticle_body_entered(body):
+	if !has_played_sound:
+		Audio.play_sound(Audio.a_bullet_casing, Audio.ac_climb)
+		has_played_sound = true
+
diff --git a/objects/enemy/bullet_casing.tscn b/objects/enemy/bullet_casing.tscn
index 40007dd..32239f0 100644
--- a/objects/enemy/bullet_casing.tscn
+++ b/objects/enemy/bullet_casing.tscn
@@ -1,16 +1,20 @@
-[gd_scene load_steps=4 format=2]
+[gd_scene load_steps=5 format=2]
 
 [ext_resource path="res://graphics/particles/bullet_casing.png" type="Texture" id=1]
+[ext_resource path="res://objects/enemy/bullet_casing.gd" type="Script" id=2]
 
 [sub_resource type="PhysicsMaterial" id=4]
-bounce = 0.75
+bounce = 0.5
 
 [sub_resource type="RectangleShape2D" id=3]
 extents = Vector2( 1, 1.5 )
 
 [node name="BoneParticle" type="RigidBody2D"]
-collision_layer = 16
+collision_layer = 17
 physics_material_override = SubResource( 4 )
+contacts_reported = 1
+contact_monitor = true
+script = ExtResource( 2 )
 
 [node name="Sprite" type="Sprite" parent="."]
 texture = ExtResource( 1 )
@@ -21,3 +25,6 @@ shape = SubResource( 3 )
 __meta__ = {
 "_edit_group_": true
 }
+
+[connection signal="body_entered" from="." to="." method="_on_BoneParticle_body_entered"]
+[connection signal="body_shape_entered" from="." to="." method="_on_BoneParticle_body_shape_entered"]