Entertainment Tonight was on the set of Iron Man 2 over the summer, and in true ET fashion they teased the set footage before the actual air date of said footage (on Thursday), and, of course, that teaser is making its way around the internet today. From the looks of it, the day ET was on set was when they were shooting that racetrack scene -- which included Mickey Rourke's first appearance as Whiplash and a bloody Tony Stark. We've already seen images from the racetrack (they were two of the first to be released, see one above), and the Iron Man 2 footage previewed at Comic Con revealed more of what I imagine will be the film's first major set piece.

Check out the ET teaser video after the jump, and tune in on Thursday for the full reveal. Iron Man 2 hits theaters on May 7, 2010.