Actor Mark Ruffalo once performed on-stage stoned - after a co-star swapped a stage prop for a marijuana cigarette.
The Shutter Island star was performing in an unidentified play when he took puffs from what he thought was a fake joint only to feel his head spinning as he realised it was real.
He tells UK talk show host Graham Norton, "It was terrifying. It was the opening night with all the critics. But I had the best review of my entire career!"
Ruffalo did not give details of the play or where it was staged.