Director: Danny Boyle
Stars: Ewan McGregor, Jonny Lee Miller, Robert Carlyle, Ewen Bremner, Kevin McKidd, Kelly Macdonald

Giving our readers the benefit of the doubt here, we're going to assume that none of you have tried any narcotics, beyond, perhaps, your mistress named Mary Jane. What's the best way to stay on the straight and narrow, then? Give Danny Boyle's disturbingly comedic Trainspotting a gander.

The loopy, anything-goes saga of drug users on inexorable downward spirals, it's one of the few movies concerning abuse that genuinely makes the viewer feel as if he or she has snorted, inhaled, or injected. And, based on the reaction Ewan McGregor's character has after diving into a feces-littered toilet to recover his drugs, it's not a fun time.