The show is supposedly improvised but somehow when they play film dub they know what's going to happen in the film before hand. The only way they know this is if they've seen the film before therefore they've rehearsed it. Update: it has been revealed that the cast views these films before the show is recorded, but they don't know ahead of time what is involved in other games. A slight exception for Colin and Ryan is when they play some games that had the same setup as when they were played on the British version. For these games, Colin and Ryan might repeat lines, if they can remember them from 20 or so years ago.