Detroit Lions QB Matthew Stafford didn't have any open receivers. That doesn't matter when you can throw an alley-oop in triple-covered Calvin Johnson's direction.
The Cowboys were up 13 on the Lions before that catch. The Cowboys were down four to the Lions when time ran out, on account of another Stafford-to-Johnson TD that give them their first lead in the game with just 1:44 left.
Lions WR Calvin Johnson journeying toward greatness [Detroit Free Press]