The Broomba Self-Propelled Broom For Harry Potter Fans

Unfortunately, the Broomba doesn't clean up after you like a Roomba might, but it does travel autonomously around the room cackling and playing scary music.

As menacing as that sounds, this evil can be stopped in it's tracks by carpet, stairs and / or a gentle push. It can also be humiliated by children attempting to play Quidditch. [Grandinroad via TGH via OhGizmo via Likecool]