Someone who knocks on your door at 6 a.m. for no reason.
A door.
Walked into a door. Later, another shiner More doors *nods* One does not simply walk into more doors.
Well I'll be a monkey's uncle!"
By telling them knock knock jokes!
Parent: "Wh-" Me: "Moo!"
A Piecycle.
Nobody asks, 'who's there ' when you try and tell a knock knock joke.
Someone who pointlessly knocks on the door.
None. Once they shut up, no-one has any reason left to oppress them :)
Me: Procrastination. B: How is that a positive M: I'll give you my reasons. Later.
Burn a question mark on their front lawn.