Watch Zac Efron as Snoopy in his real-life high school musical

It has to be seen to be believed.

Zac Efron has been doing the rounds of American chat shows this week promoting his new film, Bad Grandpa.

So as press junkets go these days, we knew it wouldn’t be long before something cringe worthy happened the Hollywood star - but little did we know it would involve that time he dressed up as a dog and moon-walked across the stage.