Nguyen Manh Quan (top), 26, a civil servant, carries a girl using his throat area as he performs during a showcase of the traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. Thien Mon Dao, a traditional Vietnamese martial art, was formed by 18th century villagers in Du Xa Thuong village, who believed the art form could help improve health as well as fight against foreign invaders. There are currently about 3,000 practitioners including farmers, industry workers and state servants. These practitioners say they are able to bend metal against their bodies and carry heavy objects using their throats, eyes or tongues, as well as run across the surface of a river, according to Thien Mon Dao kung fu master Nguyen Khac Phan. (Photo by Reuters/Kham)

Do Dang Tuan uses his right eyelids to pull up a bucket of water attached to a rope, as he performs during a showcase of traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. (Photo by Reuters/Kham)

Nguyen Manh Quan (top), 26, a civil servant, carries a girl using his throat area as he performs during a showcase of the traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. (Photo by Reuters/Kham)

Vietnamese student Le Duc Thang, 24, bends a metal spear by pressing it into the area around his right eye as he performs during a showcase of traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. (Photo by Reuters/Kham)

Dang Tien Duy (front), 28, bends a metal bar around his head as he performs during a showcase of the traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. (Photo by Reuters/Kham)

Vietnamese student Le Duc Thang, 24, bends a metal spear by pressing it into his throat as he performs during a showcase of traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. (Photo by Reuters/Kham)

Do Dang Tuan uses his right eyelids to pull up a bucket of water attached to a rope, as he performs during a showcase of traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. (Photo by Reuters/Kham)

Vietnamese student Le Duc Thang, 24, bends a metal spear by pressing it into the area around his right eye as he performs during a showcase of traditional Thien Mon Dao kung fu at Du Xa Thuong village, southeast of Hanoi, Vietnam May 10, 2015. (Photo by Reuters/Kham)