Renton tries to give up heroin. He decides to kick his junk habit cold turkey, and boards himself in his room. Even before he starts to feel the symptoms of withdrawal, Renton has ripped off the boards and is desperately searching the streets of Edinburgh for another hit.

Well, I too have an addiction I can't seem to leave behind. No, I am not a smack addict, but sometimes I think my vice is equally destructive. You see, I love catching falling knives. Yup, I am not proud of it, and please don't tell my kids.

I put in place trading rules to keep myself on the straight and narrow.