You do not go for 2

under 8 minutes to go...in this case they got it, but here's why you DONT go for 2...
It ONLY helps you if you think that UAB is going to score two FGs and you are trying to ensure a TIE.
Now, what if UAB scores a TD and you DIDNT get the 2pt?
Well, they'd be up by 3 then: 16-13.
Now, SMU gets the ball and they COULD have scored a FG to win it, instead, they are scoring a FG to tie.
That is why you don't go for 2 in this situation...minimal advantages with terrible consequences.
It ONLY helps you if you think that UAB is going to score two FGs and you are trying to ensure a TIE.
Now, what if UAB scores a TD and you DIDNT get the 2pt?
Well, they'd be up by 3 then: 16-13.
Now, SMU gets the ball and they COULD have scored a FG to win it, instead, they are scoring a FG to tie.
That is why you don't go for 2 in this situation...minimal advantages with terrible consequences.