A brick could be used as a doorstop. But that’s obvious. What isn’t obvious is why somebody would want to stop a door, since doors represent openness. What is that person hiding behind that door that they want to stop people from opening it up? I don’t know, but it’s got to be diabolical, and if anything is to be stopped, it’s not the door—it’s the evil plan by the Door Master to take over the world.