As far as automobile unveilings are concerned, most companies tend to stick to the usual method of showing at auto shows. However, Acura is not your average car company, and they decided to give a preview of the new NSX Roadster at the star-studded The Avengers premiere. To top it off, Robert Downey Jr. was given the honor of driving the one-of-a-kind drop-top onto the red carpet, making a very cool grand entrance. Acura sponsored the film, and the other cast was also seen arriving in various Acura models as well. Watch the videos after the jump to see how the NSX looked when it drove into the premiere.