Motorcycle trials champion Julien Dupont was "very nervous" as he found himself in the perched on his bike, parked on Mexico City's three-quarter-mile Montaña Rusa roller coaster. But he looked freakin' fearless ripping backflips on the skinny track 100' off the ground.

"This is why I love Mexico, because this is the place where the impossible becomes possible," said Dupont. He's got a point; you'd be hard-pressed to find an American amusement park that would sign off on this kind of liability.