Melvin Burkhart (1907–2001) was a sideshow performer known as the Human Blockhead for driving a large steel spike up his nose with a hammer.
He was also known as Melvin the Two-Faced Man, due to his ability to wear different facial expressions on the two sides of his face, and as Melvin the Anatomical Wonder for his abilities as a contortionist.
His act also included magic, sword swallowing, fire eating, and an electric chair.