While up in the air she also performed "ballet", as she calls it, but it was a style of ballet rarely, if ever, seen before. She'll be on a Hula-Hoop-type device dangling from a helicopter as it flies 300 feet (91 meters) above the Falls.
Trapeze artist Erendira Wallenda belongs to a family of circus performers.
Dressed in a black body suit, the mum-of-three was tethered by her waist as she swayed from a large hoop in front of a crowd.
I don't know about you, but there is no amount of money I'd do that for.
"It must have been such a rush for her to be up there", said Melissa Babiarz, from Buffalo.
"If a guy can do it, a girl can do it, too", Erendira said after accomplishing Thursday's feat of dental strength.
The daredevil couple hopes millions will watch the stunt around the world and be inspired to visit Niagara Falls. At one point she'll hang from her toes. She said her dentist made her a mouth guard that she will wear, but she will use her jaw muscles to avoid falling.
"You can't do what we do and be freaked out", she said.
"It gives me goose bumps", he said. "Here is the new world record holder, my handsome wife, Erendira Wallenda".
"It was absolutely attractive", said Mrs. Wallenda, when asked to describe the feeling of being above the falls.
Janet Dooley, a tourist from California, added that a stunt like Wallenda's would make for "a nice yearly event".
The stunt comes almost five years after Nik put on the headline-making performance, crossing 200 ft. above the falls.
"But this is about the attention of the world to this region and we've proven that twice now", he said.