"(My biggest fear is) being on set with a practical joker. Thankfully it's never happened. I don't get practical jokes. There was someone on set the other day talking about a prank he played on the director. He'd wrapped the director's car with clingfilm (cellophane) and poured water on it so it shrank. I'm thinking - well, that's funny for about two seconds." TRUE BLOOD star JAMES FRAIN hates pranksters.