Tell me HOW you came up with that 80% in your figure favor? Did you just make that up or did it come in a dream? Just remember one thing this in the NFL and nothing is 80% when you are betting against the spread. Show me the math and the numbers or quit spouting garbage!
Check "Win Probability"
http://www.espn.com/nfl/game?gameId=400951571
Although that doesnt apply to the in game bets. ML if anything.