Someone who pointlessly knocks on the door.
The knock speeds up.
Let my peephole grow!
Bill Cosby
She had no arms. Knock knock Who's there? Obviously not Sally
A melancholy.
He didnt use the main stream
Someone who knocks on your door at 6 a.m. for no reason.
Both ride bicycles and are on a mission.
Because they don't believe in higher powers.
An atheist. He doesn't really believe in himself.