These prop bets are usually placed before or during the game for things that have very little to with the direct outcome of the game.
“It’s anything and everything from how long a singer sings the National Anthem to how many yards are gained on the very first play to how many yards are gained during the second half,” explained attorney Rogge Dunn.
>>MORE: Super Bowl LIII Prop Bets: From The Ordinary To The Crazy
But Dunne said prop bets can create legal issues if the players or singers are in on the bet.
Thus, the NFL is asking congress to outright ban prop bets, fearing match fixing.
Click here for examples of prop bets from the Washington Post, for those of you who want in on the action.