“What sort of person,” said Salzella patiently, “sits down and writes a maniacal laugh? And all those exclamation marks, you notice? Five? A sure sign of someone who wears his underpants on his head.”
Terry Pratchett, Maskerade
Hercule Poirot is Not the Cheshire Cat
“I am not mad. I am eccentric perhaps–at least certain people say so; but as regards my profession. I am very much as one says, ‘all there.”
Hercule Poirot in The Mystery of the Blue Train by Agatha Christie