Even more selfpromotion

Insomnia is a bitch. But it resulted in a new video. This one is of Hugh Laurie getting hit over and over and over and over and over again. He's really good at it. As Stephen Fry said: "One of Hugh Laurie's extraordinary talents is being hit, for some reason he is a genius at it".
As far as I know, in only one of these clips is he getting hit for real. Can you spot which one?
http://www.youtube.com/watch?v=FpWYDNvl5sU