In the play depicted just below, the Dolphins are originally aligned in a split-back formation with rookie receiver Jarvis Landry positioned at halfback. Prior to the snap, Landry motions out of the backfield to the right. Tannehill is instructed to read the reaction of the linebackers to determine whether the Chargers are in man or zone coverage. The motion by Landry pulls Chargers linebacker Donald Butler out of the box, but safety Eric Weddle replaces him as the defender in the hole. Despite Weddle's presence in the box, the swing route by Landry creates a void for Charles Clay on his crossing route across the field. Tannehill hits Clay for an easy 24-yard gain -- thanks, in large part, to clever pre-snap motion (TO VIEW THE PLAY, SCROLL LEFT TO RIGHT ON THE IMAGE BELOW):