In my opinion, that play changed the entire outcome of the game against the Falcons. It wasn't much, but they always call that when you touch the quarterback anywhere in the head area.
49ers kept the ball as a result for that drive that resulted in a fumble at the 1, then stopped Falcons on 3 and out to keep their great field possession to go ahead for the game winning TD drive that started at the 38 yard line. The 49ers had the ball for so much of the 4th quarter because of that play, and it caused the go ahead TD. Cant imagine losing on a play like that.