Here's a good breakdown on the screen pass by Chris Brown of Smart Football, probably one of the best X's and O's sites out there. He wrote the piece for Grantland:
http://www.grantland.com/blog/the-t...-t-j-breaking-down-alabamas-game-winning-play
http://www.grantland.com/blog/the-t...-t-j-breaking-down-alabamas-game-winning-play