I came across this still of Conrad Veidt from the 1928 silent film THE MAN WHO LAUGHS, and while I had heard that the visual for Batman's arch-enemy, the Joker, was cribbed from that film, I had never before found a letter perfect example. Well, feast your eyes on this shit:
I don't know what you think, but that's the motherfucking Joker.
In the film, the character was disfigured as a child, a permanent smile carved onto his face, and damn my eyes if he isn't creepy-looking as all fuck. That visage would go on to delight comics fans for over six decades, a countenance forever connected with diabolical schemes such as this; from "The Joker's Comedy of Errors," BATMAN #66 (August-September 1951):
Don't worry, dear readers! It's Batman, and I'm sure he can more than handle the Joker's boner!