Performance artist Donny Vomit pulls a nail out of his nasal cavity ahead of the sixth annual World Sword Swallower's Day celebrations outside the Ripley's Believe It or Not! museum in Los Angeles, California February 23, 2013. REUTERS/Adrees Latif (UNITED STATES - Tags: ENTERTAINMENT SOCIETY)

Petra the koala receives her medication after an operation at Sydney Wildlife World March 5, 2008. "Petra" had a CT scan and was diagnosed with a fungal disease called Cryptococcus, which is a common disease found in the nasal cavity of some koalas and is caused by a fungus associated with a particular eucalypt trees. REUTERS/Mick Tsikas (AUSTRALIA)

Petra the koala receives her medication after an operation at Sydney Wildlife World March 5, 2008. Petra had a CT scan and was diagnosed with a fungal disease called Cryptococcus, which is a common disease found in the nasal cavity of some koalas and is caused by a fungus associated with a particular eucalypt trees. REUTERS/Mick Tsikas (AUSTRALIA)

A performer from the U.S. known as "The Enigma" hammers a nail into his nasal cavity during the inauguration of the International Tattoo Convention in Lima November 23, 2007. REUTERS/Pilar Olivares (PERU)

A performer from the U.S. known as "The Enigma" pulls a nail out of his nasal cavity during the inauguration of the International Tattoo Convention in Lima November 23, 2007. REUTERS/Pilar Olivares (PERU)

PICTURES OF THE YEAR 2004 Scottish performer John, of Les Studios de Cirque de Marseille, hammers a nail into his nasal cavity as his theater group does their Kamikaze show to close out the 1st International Tattoo and Corporal Art Convention Lima 2004, in Lima, Peru, early September 20, 2004. More than 40 tattoo studios from Argentina, Bolivia, Chile, Ecuador, France, Peru, Spain and the USA participated in the first event of this type in Peru. REUTERS/Pilar Olivares REUTERS

Scottish performer John, of Les Studios de Cirque de Marseille, hammers a nail into his nasal cavity as his theater group does their Kamikaze show to close out the 1st International Tattoo and Corporal Art Convention Lima 2004, in Lima, Peru, early September 20, 2004. More than 40 tattoo studios from Argentina, Bolivia, Chile, Ecuador, France, Peru, Spain and the USA participated in the first event of this type in Peru. REUTERS/Pilar Olivares RR ODLY PP05080195 RR

Scottish performer John, of Les Studios de Cirque de Marseille, hammers a nail into his nasal cavity as his theater group does their Kamikaze show to close out the 1st International Tattoo and Corporal Art Convention Lima 2004, in Lima, Peru, early September 20, 2004. More than 40 tattoo studios from Argentina, Bolivia, Chile, Ecuador, France, Peru, Spain and the USA participated in the first event of this type in Peru. REUTERS/Pilar Olivares RR