This is the win probability chart for the Super Bowl.  It takes into account things like the score, possession, time remaining, and field position to determine the teams’ likelihood of winning at any given point in the game.

The average game is a steady incline or decline towards 100% for the winning team, not a roller coaster or an EKG.  Sunday’s Super Bowl: fucking bananas, man.

[Advanced NFL Stats via Field Gulls]