From the Hamilton Spectator:
As the belly button goes, so goes the rest of the body.
That saying never made it into the lexicon of high-wire walkers, but it helps explain how Nik Wallenda will attempt to cross over Niagara Falls on June 15.
The daredevil will be 60 metres above the water barreling over the falls, holding nothing but a 30-foot pole weighing between 16 to 25 kilograms across his belly button.
“It’s very difficult to do, but scientifically wire walking is just simple physics,” says Julie Jones, a scientist with the Ontario Science Centre