Heartthrob Zac Efron got a bad case of poison oak poisoning during a camping trip over the Memorial Day weekend. 'It was my first time getting it. Dude, it's, like, everywhere. I can't even begin to show you because you'll get so grossed out. I look like a zombie from Dawn Of The Dead,' he told Details. The 22-year-old actor explained he made contact with the highly toxic plant while leading nine friends to a secret waterfall in a Californian park.

After having carefully avoided the plant on the trek, it was while jumping into a pool of water that the High School Musical star brushed against the leaves.'My legs were shaking,' he says. 'The pool started to look out of focus. It would get closer, then further away. So I sat down for a minute, but everyone was egging me on to jump.

'I'd never seen anyone go off this jump. So I was like, 'I gotta do this. I brought everyone here. We made it through the poison-oak forest. I gotta at least do this jump.'' 'Half of his back has been taken over by a crust resembling swollen cornflakes,' the magazine reported.