http://onanimation.com/video/IA_reel.mov

“Here’s another progression reel by Jeff Gabor from Ice Age 3. This one is incredibly resourceful because of how thorough it is. Every stage of the shot’s development is shown. Would be animators can gauge just how much work it takes to make a shot like this that breezes by so quickly. This has already been posted at Animation Progression Reels, but I’m posting a high definition Quicktime download which is great for frame by frame analysis.”

http://www.onanimation.com/2010/06/10/in-depth-shot-progression-reel/