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A human blockhead is a carnival or sideshow performer who hammers a nail or other implement (such as an awl or screwdriver) into his or her nasal cavity via the nostril. The stunt is often shocking to audiences, who believe that the nail is being hammered into the skull itself. In reality, the stunt plays on the anatomical misconception that the nasal cavity goes upward, rather than straight back. The performer merely learns the terrain of the nasal cavity and lessens his or her sensitivity (and urge to sneeze) until the implement can be slid straight back through the nasal cavity until it hits the back of the throat. The use of a hammer merely adds to the shock value by creating the illusion that the nail is being pounded through bone. Some performers have even gone so far as to use a power drill.
This stunt is said to have been developed by renowned magician and sideshow performer Melvin Burkhardt (1907-2001) after his nose was broken in a boxing bout and he became fascinated by the way that the doctors inserted instruments into his nose. Since then, it has become one of the staple acts of the sideshow. Over the years several variations of the act have been developed by numerous performers and objects used range from running power drills, fireworks, lit fire-eating rods, condoms, balloons, cork screws, letter openers, spoons, forks and much more.
One example of a variation of the original Human Blockhead act is the "Human Meathead", created in 2000 by Ryan Stock. The performer displays a large meat hook and then proceeds to force it into the nostril, through his nasal cavity and out his mouth. When performing this stunt, Ryan Stock has said that he had suspended up to 70lbs from the end of the inserted hook.
- Elizabeth Gilbert: The Lives They Live: Melvin Burkhart, B. 1907; Life as a Blockhead, The New York Times, Dec. 30, 2001
- Douglas Martin: Melvin Burkhart, 94, 'Human Blockhead', dies, International Herald Tribune, Nov. 19, 2001