A big pass, a broken tackle, a pick-six or maybe a punt return for a touchdown.
Where will the big play come from this week when Alabama and LSU square off?
There are plenty of players on both sides of the ball that could provide the type of electrifying moment that has separated the teams the past four games.
Can Trent Richardson ignite his Heisman campaign with a big-time run against the Tigers?
Will Rueben Randle streak down the sidelines and catch a ball in stride to break the Tide defense?
Perhaps it will be a defender like Dont'a Hightower, Courtney Upshaw, Tyrann Mathieu or Sam Montgomery.
Usually a big play provides that needed spark. Let's look at the big plays that changed the momentum the past four contests.