Zac Efron goes shirtless at MTV Movie Awards

Zac Efron was speechless -- and then shirtless -- as he accepted a golden popcorn prize at the MTV Movie Awards.

Efron won the award for best shirtless performance (for his role in "That Awkward Moment") during Sunday's show.

Accepting the award from actress Jessica Alba and singer Rita Ora, he found himself at a loss for words. "I really don't know what to say," he told the crowd.

And just as he started to thank his fans, Ora ran back out and ripped Efron's shirt open. The actor then obliged the audience by taking the button-down off entirely. He flexed his muscles, gave a salute or two and that was that.

Though, really, what else would you need to say (or do) while accepting a shirtless award?

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