I think that was my idea, to have the Captain America Fitness Challenge. You know, it's so collaborative. I really don't remember whose idea is what, at this point. But I just remember having the President's Fitness Challenge when I was in elementary school and middle school. You had to do different activities, and at the end of it, I think you got a little pin or a badge. I was like, 'How do we incorporate Captain America into high school?' You would have the Captain America Fitness Challenge .He would be the person teaching you about proper nutrition, and brushing your teeth. [Laughs]

When we shot those... you talk about feeling like you are filming a documentary? That's what it was like. It was like Captain America showed up. I generated so many of these dumb things, along with one of the other writers. We just wrote -- everyone had ideas for things that Captain America could say [on screen]. So we just put them into a teleprompter, and had Evans stand there and really read through them. It's really funny, because Chris is so NOT like Captain America in person, but him being Cap and then just reading this stuff totally fresh, in that old costume, was so funny. It was all so very funny. ... There's a very fun improv comedy to all of that. We shot so many more than are in the movie, too. Which will probably be on the Blu-ray someday.