He is also notable as one of the few sword swallowers in the world.
It's also not widely studied in the field of medicine, perhaps because there are so few sword swallowers.
Meyer invited 21 of the remaining known sword swallowers from around the world.
In spite of the dangers involved, many sword swallowers teach themselves.
The study involved the voluntary survey of 110 English-speaking sword swallowers.
"You're going to see the sword swallower - Jewish, married, but willing to fool around tonight," he said.
The most common medical complaint from sword swallowers is sore throats.
Kondini continues to work as a sword swallower and escape artist despite being in his 70s.
Authentic sword swallowers really insert all of these objects into their throats.