Watch Shirtless Zac Efron Jump Off a Cliff with Bear Grylls

Efron is the first of several celebrities who join Grylls on a series of high-octane trips. Ben Stiller, Channing Tatum and NFL Hall of Famer Deion Sanders are also traveling to remote locales in hopes of experiencing a 48-hour journey of a lifetime.

You can catch the rest of Efron’s shirtless adventure through the wild on the season premiere of “Running Wild with Bear Grylls,” on July 28 a 8 p.m. ET on NBC.