Robert Pattinson asked a sexy fan to strip for him as a joke - and was stunned when she started peeling off her clothes.
The Brit has learned he has to watch what he says in front of crazed fans - because they'll take him at his word.
In a taped interview with chat show host Ellen DeGeneres, which will air in America on Thursday (19Nov09), the 23-year-old actor admits he was taken aback when a fan started undressing in front of him at an autograph-signing session.
He recalls, "I kind of got bored... She asked, 'How can I get your attention?' I was like, 'Just take your clothes off.'
"She stood there and frantically started taking her clothes off and got dragged out of the room by security. I never felt more terrible."
The actor is currently enjoying huge box office success with New Moon, the latest picture in the Twilight Saga movie as it stormed to the top of the U.S. box office grossing $140 million.
The movie was already a record breaker as it became the biggest pre-release movie of all time last week and fans flocked to cinemas despite mixed reviews from the critics.
And Twilight fever looks set to continue as Eclipse, the third film in the series, will be released next summer.
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