Zac Efron is jumping feet first into his latest television gig.
"I can't believe how high this is," an apprehensive-looking Efron notes before taking the plunge.
"We're now committed," Grylls says, shortly after chucking his and Efron's backpacks into the water below. "We started together, we're going to finish together."
Check out a sneak peek of Efron on the Running Wild premiere below. Will you watch?
Running Wild with Bear Grylls premieres Monday, July 28 at 8/7c on NBC.