They sure know how to lure in viewers...

Zac Efron appears on Running Wild with Bear Grylls, and in the first episode of the new NBC reality series, the former High School Musical hottie heads off on a two-day excursion in the Catskill Mountains with Grylls. "Should've packed my junk better," Zac joked while parachuting through the air. Oh, trust us ... it gets better!

At one point the boys sit down and have a heart to heart chat, and when asked about reaching fame at such a young age and going to rehab earlier this year, Zac said:
    "It was just so quick -- it was shocking. The challenging part was never the work, that was never it. It was sort of the in-between work -- the social aspects outside of it; everywhere you go to an extent there is press and it can be confusing and pretty soon you need a social lubricant. It was getting to the point where I was caring less about the work and caring more about the weekend. I couldnt wait to go out. And sort of let loose and have fun. But when Monday and Tuesday were difficult to get through, then I was like 'ugh this is bad.'"

Setting aside deep talks about life, Grylls and his new BFF also ate a worm omelet with the eggshells at during the premiere episode. "That was so gross," Efron said of the snack. Sounds about right ... click the video above to watch!