"You turn up and there's a thin stuntman wearing one of those sumo suits, those weird things where you look like (Charlie & the Chocolate Factory character) Violet Beauregarde after she's turned into a blueberry, (and) you say, 'Who's that guy doubling?' and they (producers and crewmembers) sort of shuffle uncomfortably. I'd rather get killed doing it myself than know how fat I am." British funnyman Nick Frost prefers to perform his own stunts on film sets.