Assaulter Ego

There once was a man, or else two
He had fun quaffing rancid homebrew
With his split personality
He'd commit immorality
A grunting, big-fanged bugaboo.

David Cairns

Muriel Carew (Rose Hobart) is threatened by Edward Hyde (Fredric March), the alter ego of her fiancée, in a still from Dr. Jekyll and Mr. Hyde (Rouben Mamoulian; 1931).