San Diego State started the game with a trick play by opening with an onside kick. The gamble did not pay off for the Aztecs, as BYU senior Andrew Stacey made a heads up play by signaling for a fair catch and was subsequently hit by an Aztec defender. The ensuing penalty placed BYU on San Diego State's 43-yard line to begin its opening drive.
https://byucougars.com/news/2006/10/07/huge-half-buries-aztecs