Not as daunting recently, but any team that wins 94% of their games at home is a pain in the neck.
Hopefully BYU wins by 22, but I'd take a win by 1 just to get over the hump.
2001 Washington State 41-20
2005 Boston College (technically a bowl game) 27-21
2011 TCU 36-35
2012 SDSU 21-19
2015 New Mexico 31-24
2015 Air Force 37-30
2017 Virginia 42-23 (Hi, Bronco)
2018 SDSU 19-13
2018 Fresno State 19-16 (MWC championship game)