Ben Stiller, 48, got a taste of his own (humor) medicine when he went rappelling for the first time with adventurer Bear Grylls.

The Secret Life of Walter Mitty actor is the next celebrity exploring the wild with Grylls on the NBC reality series Running Wild with Bear Grylls, which airs tonight.

Last week, Zac Efron had the time of his life jumping out of airplanes and dining on worms with Grylls in the Catskills Mountains.

For Stiller’s first ever rappel down the face of a cliff, Grylls decided to try and use humor to help the visibly nervous Stiller conquer his fear.

“Ben has never rappelled before, so I am going to try and make it a little bit fun,” says Grylls in a clip of the rappel. “I figured if he’s laughing, he’s not scared!”

Not so sure his tactic worked since the Zoolander actor continues to have that nervous look on his face all the way down the side of the cliff.

“This isn’t safe!” noted Stiller as the two rappelled into a ravine looking for food and shelter for the night.

'Running Wild with Bear Grylls': Ben Stiller rappels into a canyon http://t.co/zHwtWwahpY pic.twitter.com/I7JwMVXj0S

— Zap2it (@Zap2it) August 4, 2014

Grab your survival gear! Tonight at 8/7c, Ben Stiller (@RedHourBen) tests his limits on @NBCBearGrylls! pic.twitter.com/7oh3xH2bnL

— NBC (@nbc) August 4, 2014

@BearGrylls and ben stiller in #RunningWildWithBearGrylls @NBCBearGrylls pic.twitter.com/PXYHPT7hYL

— Bear Grylls Arg (@beargryllsArg) July 31, 2014

On the other hand, Stiller did succeed in scaling the face of the cliff despite his fears.

Going to attempt to “live tweet” #RunningWild with @BearGrylls tomorrow. Re-live the pain and terror and joy.

— Ben Stiller (@RedHourBen) August 3, 2014

Channing Tatum, Tom Arnold, Deion Sanders and Today show’s Tamron Hall will also try to beat the wild under Grylls‘ guidance in future episodes.

“Running Wild is where I get to take some of our most loved Hollywood stars out on a great 48-hour adventure,” Grylls said in a promo for the series. ”And I think what has been powerful for me is seeing how the wild can transform people, and it can empower people, and it can reconnect them with who they are. I think the danger of fame is that it’s easy for people to go a little bit mad.”

Running Wild with Bear Grylls airs Monday at 8 p.m. on NBC.

Image via Wikimedia Commons