Down to its final play and trailing by one, BYU pulled off a miracle in its season-opener on Saturday against Nebraska.

Backup quarterback Tanner Mangum and receiver Mitch Mathews connected on a 42-yard Hail Mary as time expired to give the Cougars a W.

What a play. What a moment.

Immediately after the touchdown, BYU wide reciever Terenn Houk ran over to the referee signaling the touchdown and enveloped him with a big Cougar hug.

The celebration didn't end on the field, as the Cougars went crazy in the locker room while holding up head coach Bronco Mendenhall.

Though BYU left with the win, starting quarterback Taysom Hill, who left earlier in the game, will be out for the entire season with a foot injury. Luckily for the Cougars, Mangum seems to have the whole "win the game" mentality down after his game-winning pass.

The 2015 FBS season has just begun, but the madness is already in full swing.