The IESB has posted three behind-the-scenes clips from Disney-Pixar's Up.  In total, it's 15 minutes of straight up, fly-on-the-wall making-of goodness, with none of the gloss one might expect from a Disney promo. Yeah that's right.  It's 15-minutes of watching a dude sitting in front of a computer while it renders seven frames of the movie.  There's also this part where Pete Docter orders a cheese sandwich from the cafeteria.

I kid, I kid.  It's pretty cool.  Watch the other clips after the jump.