I’m going to ask you a stupid question.

Suppose you’re walking down a hallway in an unfamiliar building. At the end of the hallway, you come to a door with one of those D-shaped aluminum pull handles, the sort one encounters when exiting a public restroom. Completely missing the tiny “PUSH” on what appears to be a miniscule sticker to the right of the handle, you end up yanking yourself toward the door, tragicomically bashing your face into edge of the frame, leaving a bruise in the center of your forehead.

Now, the question: Is that bruise your fault or the door’s?