WATCH: Zac Efron Strips Down And Goes Off Cliff (VIDEO)
We already know that the actor eats a worm on the show, but the latest preview footage is even crazier.
In the clip, Efron and Grylls strip down, throw their backpacks into the water way, way below where they stand, and start making their way down the rock face.
“I can’t believe how high this is,” says Efron.
Check out the video below!