Behind the Scenes with 'The Avengers'

A couple of new featurettes are out there for the new Avengers movie, the first one introducing the new additions of super-siblings Scarlet Witch and Quicksilver, played by Elizabeth Olsen and Aaron Taylor-Johnson, and the second goes behind the scenes with the cast as they hang around goofing off on set. I've never been totally convinced that these guys like each other that much, frankly. They're more like a bunch of actors who get paid a lot of money to pretend to have some rapport, but unlike, say the old Ocean's Eleven or Star Trek casts, nobody believes these guys hang out with each other in real life, do they?