A vital part of a 3-step drop passing play is that the outside blocker on the throw side (usually the Tackle) needs to cut the Defensive End and get him on the ground. The 49ers RT, Adam Snyder, failed to cut Darnell Dockett twice in the first half Monday night, resulting in an Interception by Dockett, and another deflection by Dockett, which Alex Smith caught himself, and promptly was tackled for a 6-yard loss. Neither play was Smith's fault; his job is to get to the top of his drop, and let the ball go. Snyder's job is to clear the throwing lane.