2011 Utah 54 BYU 10. Nothing like your team quitting against your rivals, while they destroy you on your home field.

2012- Boise St. 7 BYU 6. Going for 2 with a true frosh QB when the Boise kicker struggled to make an extra point and could not make an FG to save his life.
2012- BYU 6 USU 3, Yes BYU won the game, but Taysom was destroyed in the process, because BYU Coaches couldn't figure out Victory Formation.
2012- San Jose St. 20 BYU 14

2013 UVA 19 BYU 16. UVA went 2-10 that year.
2013 UW 31 BYU 16. Nothing like getting rolled in a bowl game by a mediocre UW team with an interim HC.

2014 USU 35 BYU 20, the brace on Taysom's leg from no Victory Formation 2 years earlier cost Taysom another injury
2014 Nev 42 BYU 35, nothing like not being able to stop Nevada on your own field
2014 Boise St. 55 BYU 30 More of the vaunted Bronco D
2014 Memphis 55 BYU 48. Why would you save 2 timeouts for a last minute drive when your O has already scored 48 points.

2015 Michigan 31- BYU 0
2015 Missouri 20 BYU 16. Nothing like losing to a hapless Missouri team.

And here's a really special one.
2008 BYU has a chance to end Utah's undefeated season. Utah is ahead 27-24 at the end of the 3rd quarter. BYU however continues to throw the ball, even though BYU is averaging over 7 yards/carry in the ground game, throwing 3 interceptions in the 4th quarter all of which led to Utah TD's and provide Utah with a very comfortable margin of victory.