Melvin Burkhart, shown in this 1978 file photo, in Gibsonton, Fla., was known in the carnival circle as "The Human Blockhead" for his ability to hammer a spike into his head through a cavity behind his nostril.
Melvin Burkhart, shown in this 1978 file photo, in Gibsonton, Fla., was known in the carnival circle as "The Human Blockhead" for his ability to hammer a spike into his head through a cavity behind his nostril.