Harvey stacks up a closet so full of toys and games that the next person who opens it will have everything fall on him. One anything Muppet comes by and opens the door, and the stuff just sits there neatly stacked. A second AM comes by but finds the door to be stuck. A third AM uses the door as an exit, and just walks right through. In frustration, Harvey himself opens the door and everything falls on him.
Shades of coyote/road-runner antics.