diff --git a/index.js b/index.js
index ae286fb..3efb6fc 100644
--- a/index.js
+++ b/index.js
@@ -376,7 +376,11 @@ Game.prototype.control = function(target) {
 }
 
 Game.prototype.potentialCollisionSet = function() {
-  return [{ collide: this.collideTerrain.bind(this) }]
+  return [{ 
+    collide: this.collideTerrain.bind(this) 
+  }, { 
+    collide: this.collidePlayer.bind(this)
+  }]
 }
 
 /**
@@ -420,6 +424,19 @@ Game.prototype.collideTerrain = function(other, bbox, vec, resting) {
   })
 }
 
+Game.prototype.collidePlayer = function(item) {
+  // ignore non-debris items
+  if(!item.repr || item.repr() !== 'debris') return
+
+  // aabb is a representation of an item's position and dimensions
+  var playerSpace = this.playerAABB(),
+    itemSpace = item.aabb()
+
+  if(playerSpace.intersects(itemSpace)) {
+    this.emit('collision', item)
+  }
+}
+
 // # Three.js specific methods
 
 Game.prototype.addStats = function() {
@@ -627,7 +644,7 @@ Game.prototype.setTimeout = tic.timeout.bind(tic)
 
 Game.prototype.tick = function(delta) {
   for(var i = 0, len = this.items.length; i < len; ++i) {
-    this.items[i].tick(delta)
+    if(this.items[i]) this.items[i].tick(delta)
   }
   
   if (this.materials) this.materials.tick(delta)