Extreme Jumpers Try to Make History

When you've jumped more than a football field, farther than Evel Knievel, farther than anyone has ever jumped before – coming up with an encore is difficult.

In this multiple-exposure file photo, freestyle motocross rider Robbie Maddison jumps more than 300...

In this multiple-exposure file photo, freestyle motocross rider Robbie Maddison jumps more than 300 feet at the Rio All Suite Hotel & Casino last New Year's Eve in Las Vegas, Nevada. This December 31, Maddison will jump his bike more than 120 feet high and land on top of the 96-foot-high, 40-foot-deep replica Arc de Triomphe in front of the Paris Las Vegas. Upon completing the jump, he will drop off the Arc and freefall 50 feet to a massive landing ramp below.

(Christian Pondella/Red Bull via Getty Images)

"I didn't even really know where to start with what could be next and what could be exciting," said Robbie Maddison, who last New Year's Eve in Las Vegas flew 322 feet to break the Guinness World Record for motorcycle jumping.

"The idea of jumping onto a building came, one day when I was rolling down the freeway and I could see a 12-story building. I knew that jumping on that building was definitely possible," Maddison said. "And it became an idea and a dream. And then I started thinking of it more and more and now I'm going to do it."

This year, the 27-year-old Australian will attempt to jump onto a 96-foot replica of the Arc de Triomphe on the Las Vegas Strip, and then freefall 50 feet to a ramp below.

"The jump up the building is one tough thing, but the jump down and the G-forces are incredible at the bottom of the ramp," Maddison said.

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To withstand the G-forces, Maddison has trained to strengthen his core muscles.

"The training's been pretty intense. Even with the practice jumps, I've had some close calls, nearly had some crashes and I think it's only from the new strength that it's kept me on the bike," Maddison said. "One time my hands broke the handlebar and my face went into the gas tank. I managed to ride out of it, but the training has definitely giving me some confidence."

With his training complete, Maddison said he is confident he can complete the stunt, but he knows it's not a sure thing.

"I just want to walk away from this thing safe," Maddison said. "Now it's getting to the point where I'm not sleeping very good. Every time I get the thought of doing the jump, my heart skips a beat."

'You Can't Break My Mind'

Rhys Millen doesn't consider himself a daredevil, but his resume reflects otherwise. The 36-year-old rally racing and Red Bull Drift Racing champion is also a Hollywood stuntman, having served as lead stunt driver on movies such as "The Dukes of Hazard" and "The Fast and the Furious: Tokyo Drift" – and he likes to backflip trucks in his spare time.