a high-wire performer takes on a challenge at staggering heights. that may be too daunting even more him. 41-year-old aisikaier is a sixth generation performer. a master in the ancient chinese art of high-wire walking known as dowaze. he started training at the age of six and performs across his native china without a safety harness. >> translator: it's not exciting if you put on a safety belt. no dowaze performer would use any safety insurance methods.