Clowns already look creepy. As long as they play jokes, that's okay. But when they attack people, there is really something psychologically wrong with these people. So you'd better start walking if you see them coming in a group. Because then you never know with what intentions they will come to you.
Clowns, you have them in all sizes and weights. One thing is certain, they are for no reason: You have clinic clowns, musical clowns, creep and murder clowns and circus clowns.