You are up 9-7, with 9 minutes left in the 4th
you score a TD to go up 15-7, do you go for 2 to make the lead 10 and risk failing the conversion and being up only 8 where a TD and 2 point conversion by your opponent ties the game or do you kick the extra point to go up 9 and risk that an opponents' TD and fieldgoal beats you?
I hope I explained this good enough