I think about it, and I realize there's been some version of a Batman or Spiderman or Superman franchise since I was a boy, since before I was a boy.

When Marvel put together Ultimate Spider-Man and someone came up with the idea of having Principal Coulson, they said, "Do you want to do the voice?" I thought, "I have to do the voice!" Because I have a daughter and we watch some cartoons, I couldn't bear the idea of tuning in and hearing somebody else's voice.

You know I grew up on the Batman movies, and they had some terrific actors in, but you know a lot of the other ones - it wasn't always the case that you had people the caliber of Jeff Bridges or Robert Downey, so to kind of show up and work with Jeremy Renner or Robert or with Mark Ruffalo, any of them, Chris Evans, Chris Hemsworth, the caliber of people you're acting with, to me, is really fun. From the first day I started doing scenes with Robert, it's been one of the funnest experiences I've ever had.

You can never discount the pleasure of showing up to work with Scarlett Johansson and now Cobie Smulders. That's just a day that's easy on your eyes.

I felt like people really do their best work when they're having a really good time and feel safe to push the envelope and make a jackass out of themselves.

I guess what we know about the Avengers is there's a reason why all of the heroes that we've been meeting, from Thor to Captain America - everybody - they need to work together.

For me, one of the really cool things about this is that throughout these movies, there have been - and I enjoyed it this way - hints at what S.H.I.E.L.D. is and how they function within this Marvel movie universe which, as you know, is deeply based in the comic books.