They pitched me the idea and I remember saying, 'Does anyone else swear in the movie?' They said, 'no,' and I said, 'I'm in.' [laughs] It sounded perfect to me. The actual line they used in the end, 'go f-ck yourself,' was a bit of an ad-lib. The line was originally 'f-ck off.' We did about eight takes and I said, 'Mathew, let me do just one more.'"