It was literally, they were about to wrap the movie and I saw Robert (Downey Jr.) at the Academy Awards and he had this idea. Marvel had had an idea but then they scrapped it and I thought it wasn’t going to happen. Then I saw Robert and he said, ‘What do you think about coming and doing a day?’ I said, ‘Are you kidding me? Bang, let’s do it!’ We sort of spit-balled that scene, then I came in and we shot for a couple of hours and laughed. I haven’t seen it yet but people seem to like it.