Actor Robert Pattinson says he does not know how to act. "I don't really know how to act, I kind of wanted to somehow make it real, and one of the ways I've always thought makes that a little bit easier is if you shake up your physical state just before action. You end up walking into a scene having a different ... feeling," Pattinson told the Observer newspaper, reports femalefirst.co.uk.

At times, the 33-year-old star would gag so hard that he'd actually throw up. "I forgot I had a mic on the whole time, so the producers and the director, before every single take of the movie, would get ... It kind of puts everyone else off," he said.