Spoilers, questions, etc.

Did Simon and Mark actually take heroin in that one scene? Seemed really odd and wasn't explained or referenced again.

Why did Veronica steal all the money?

Why did Spud forge the documents to allow Veronica to take the money?

What was up with the music during the Begbie/Renton confrontation?

Overall this movie just made me feel sad. I guess it was realistic, and nostalgic and pointless. Just like Sickboy said when they visited Tommy's memorial.