Damn! I just read that there was a scene in Iron Man after the credits! Ever since "X-Men: The Last Stand", I've stayed at movies through the credits just in case I miss something. Darren drove, though, so just as the credits were playing, he wanted to leave. If I had known there was another scene, I would have told him to stay!
Apparently, the scene, featuring Samuel L. Jackson as Nick Fury, was a teaser for the new Avengers movies coming out in a few years.
DAMMIT ALL TO HELL!