These are videos of Bill Walsh and Joe Montana demonstrating the level of detail involved in the West Coast Offense. Look specifically at the "rhythm throws" by Montana where he throws off of his back foot without a "hitch" step. Those are difficult throws--especially that out to the left. Another thing of note is the quickness with which Montana goes through reads both in this "practice" session and the successful plays in games. At the top of his drop if not before, he will make an instantaneous decision and immediately go to his next read, which is timed to get open after the one hitch it takes to get through a read. The whole time, he's moving to avoid giving defenders a stationary target in the pocket. Sorry BY, but Joe Montana was really good.