I just watched "Trainspotting" the other day and while I've seen it numerous times, this time I turned on subtitles and it gave me a whole new viewing of the movie where as before I was doing a lot of guessing!
For a real adventure, pick up the book. Irvine Welsh wrote a lot of it phonetically, to capture the sound of how Scottish people speak (tip: if you get stuck on a section, read it aloud).