The movie star was reluctant to film the car crash scene in the sequel because he didn't want to spend time underwater - and he insists the panic in his eyes was for real.
The actor tells Playboy magazine, ""I didn't want to do that at all. So I wouldn't be constantly aware of how scared I am of drowning, I had to go to a pool with this great stunt guy and dive master a couple of times a week for a month or so to train me to relax underwater without an oxygen mask.""
However, the lessons didn't help him sleep after he had shot the scene.
He adds, ""That night I woke up probably four times gasping for breath, thinking I was drowning. It was terrible.""