Zac Efron is friggin everywhere. When he’s not partying and making out with Michelle Rodriguez and Italian businessman Gianluca Vacchi, he’s shirtless and roughing it with renknowned survivalist Bear Grylls.

The two ridiculously fit guys pop up on the July 28 premiere of the celebrity-adventure series Running Wild with Bear Grylls, rappelling down a cliffside in the Catskills.

Which of course you must be shirtless for.

“We reached out to him and he kindly said he was a fan of the show and that he was in 120 percent,” Grylls tolld People. “He asked for the biggest, baddest adventure and it was an honor to oblige.”

Grylls, 40, picked a spot in the Catskills Mountains where special forces used to train back in the 1800s. To give Efron an extra incentive to jump off a cliff with him, he tossed their backpacks into the water below. “I can’t believe how high this is,” said Efron, 26,, before making the leap of faith.

“I like to think he got to use his muscles to their max through the adventure,” Grylls told People.



Running Wild with Bear Grylls airs Mondays at 8pm on NBC.