Don't raise the nets for PATs and field goals, let someone in the end zone catch the football and then see if we can pass the ball all around the stadium. The goal is to get the ball back to the end zone it started in. You need some capable passers/receivers to get it from the endzone to sideline seats. This happens all while the event staff is chasing the ball trying to retrieve it.

Hand out blue and white helium balloons to everyone which are released the first item BYU scores.

Rolls of toilet paper to be thrown like streamers when BYU scores.

Beach balls!

Cosmo crowd surfing (before crowd surfing was a thing). You need to pass him from the bottom to the top of the stadium. Don't throw him off the top! Only works if the student section is full to the top.

Any others?