You have played a succession of American characters. Do you find it easy to do the accent?

Not really, but I do find it a good avenue into a character, it's another form of separating him from yourself. You always try to maintain who you are when you're doing a job. It is getting a little bit easier now though, because I've done a run of six American parts.

After "Tigerland", were you wary of going into another film with a military setting?

It's a completely different film and story, and such a different character too. Tommy Hart would have met Bozz and been afraid of him, and Bozz would have laughed at Tommy Hart but then felt guilty about it afterwards. They are so different.

Just how cold was it filming in a Czech winter?

Freezing, colder than I'd ever been, especially as I had no shoes or socks on. It was tough but then that's as it should be. I shouldn't be sitting in a trailer drinking warm tea while there's 2,000 Czech extras sitting out in the freezing cold, earning as much money a day as most superstars spend on toothpaste in a week. It should be hard.

Is it true you got mugged while you were out there?

There was one guy who jumped on me, I think he might have been drunker than I was. I was walking home one night, in the early hours of the morning and this guy jumped on my neck. I don't know what he was trying to get from me, but I got the better of him for about 30 seconds and gave him a couple of digs. I was about 100 yards from my apartment, and I ran for it. Next thing I know there's a story in the papers saying "Colin Farrell beats up eight gypsies in Prague!".