Best Directorial Feature Film Debut

[Q?]

I saw Moon last night and this inspired me to start this thread.
What in your opinion is the best directorial feature film debut?
And please include your honorable mentions too.
All IMDb links:

Richard Kelly's Donnie Darko
For the time being, this is in my opinion the best debut, maybe I'll change my mind later on, but this is definitely a good one.

"Honorable mentions"
George Lucas' THX 1138
I'm very impressed by this movie, it's amazing how much Lucas has achieved with very little. I almost feel like this should take the spot for best debut.

Duncan Jones' Moon
This is partly inspired by my 2 favourite movies ever, Blade Runner and 2001: A Space Odyssey. Fantastic job on this movie. Although it can be "drowned" by its own hype.

George Clooney's Confessions of a Dangerous Mind
If you haven't seen it, rent it. This has also Sam Rockwell in the lead.

Hitoshi Matsumoto's Big Man Japan
This movie deserves a bigger fan base, very funny and unique.

David Fincher's Alien³
The Assembly Cut is reported to be closer to David's original vision, this gets too much bad critisism in my opinion.

I probably forgot some movies, but this is my list for the time being.
List yours.