Primarily used to intercut with the main shot for interviews, roughly twenty minutes of uncut behind-the-scenes b-roll footage has been released in anticipation for Marvel's The Avengers. By far the most revealing material next to seeing the actual film, apparently even using Alan Silvestri's original score.
One must admire all those people working in the movie industry for their patience. All those times spent setting up the scene, preparing the cameras, etc etc.
No one tweetering? Playing with a gameboy or something to wow away the time?