donnie darko is my favoritest movie of all time, in case anyone were curious (and why wouldn't you be? i'm an interesting person!).
i don't know which "huge bunny with the metal face" you're talking about, unless you mean frank, in which case the answer to your question is "he's one of the main characters of the film."
btw, if you happen to possess the DVD of the movie (or even if you have to rent it), watch it with the Kelly/Gyllenhaal commentary. it's really helpful.
---
- christ@myself.com - fuck a cat, kill yourself - my alter ego has five stars