A member of the legendary Flying Wallendas, fighting cancer and walking with an artificial leg, kept a 300-year-old tradition alive Saturday when she tiptoed across a tightrope - despite a scary slip.

Angel Wallenda, 22, lost part of a leg to the cancer now deemed inoperable and diagnosed as terminal. She wears a prosthesis below the knee.Cancer surgery also took parts of both lungs, but rather than spend her days in a hospital, she decided to attempt the high-wire walk at a show benefiting a local prisoners-of-war group.

An audience of about 200 people got a scare when her leg prosthesis slipped and caused her to wince in pain.

"I screwed up. I twisted my leg in my socket," Angel said afterward. "If I were to do it again, I'd look a lot better."

The slip came about 50 feet into a 60-foot inclined walk. She finished the climb shakily.

Doctors recently gave up hope of halting her cancer with surgery, chemotherapy or other treatments.