[EricH]

Originally Posted by Kevin Watson

Yes, he spent some time at SpaceX before the first Iron Man. He spent time with Elon and other engineers. He even spent some time with one of our mechanical engineers, who taught him to use the mechanical CAD package we use.

-Kevin

I could swear I've seen an Elon cameo in Iron Man 2--just a segment (I haven't actually seen the movie, but the segment was on Youtube)--where he was addressed by name.

Of course, then there are the extra security guards near the cafeteria. All three of them (including the small one Stark is holding)... But one is not Iron Man-related.