- Fake Scot: Jamie Bell as Ray Lennox.
- Harpo Does Something Funny: The alley scene after the Christmas party had no directions in the screenplay; it was simply called "Shit Reservoir Dogs".
- Method Acting: James McAvoy revealed in an interview that he would drink up to half a bottle of whiskey every night so that his character looked rough and hungover.
- What Could Have Been:
- You Look Familiar: Assuming the film version is still set in the same continuity as Trainspotting, Shirley Henderson playing Bunty in this work and Gail in Trainspotting qualifies.
Trivia / Filth