Have you ever tried to prop a chair up against a door to hold the door shut? It doesn’t work. The chair just ends up falling down on its 4 legs allowing it to slide away as the person you’re trying to hide from comes in and invades your space. Doesn’t sound fun, right? David Ballou has your answer. He’s made the Who’s There Chair with rear leveling feet so that it can in fact tilt and stay in place. The back support even has a notch cut out of it to fit most standard door handles.