Human blockhead

A white woman with long brunette hair hammering a nail into her nose with a gold hammer covered in silver rhinestones and gems.
Performing human blockhead
Professional sideshow performer, Captain Darron von Awesome of Tinderbox Circus Sideshow, who can perform this variation of the human blockhead
Close-up of the human blockhead using a 6-inch (15 cm) nail

A human blockhead is a carnival or sideshow performer who hammers a nail or other implement (such as an ice pick, awl or screwdriver) into their nasal cavity via the nostril.