Akin to the "big balls" dance in the NBA, the NFL really doesn't like it when their players make any gesture involving the area below the belt. They especially don't like it when Seattle Seahawks running back Marshawn Lynch grabs his crotch, as he's taken to doing during these NFL Playoffs. 

To ensure Lynch chills with sack-grabbing, the NFL is threatening to flag him for a 15-yard unsportsmanlike conduct penalty if he does it during the Super Bowl. If he does it after scoring a touchdown, the Seahawks will have to kick from the 20-yard line on the ensuing kickoff. 

Lynch doesn't have much regard for rules, so something tells me that after a big play you're going to see Beast Mode going all Michael Jackson on us again, whether it's on the sideline or as he dives into the end zone. Just another reason (as if you needed one) to watch the big game on Feb. 1. 

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[Via Pro Football Talk]