I love MNF for this very reason, more often than not 2 or 3 games can be decided
Two goods ones from my own history:
Last year Jason Elam needed to kick a FG and an XP to win on Monday night. He lined up to kick and missed and pulled his groin, he then kicked a FG and then came out of the game...one point loss...bastard
Four or Five years ago I played in a league where your Defense got -2 points if the lost and +2 points if the win. I went in to Monday Night trailing by 1 with my opponent having the fabled Giants D. The Giants lost, their D had no Fumble Recoveries, Ints, Sacks etc and I won by 1.