Watch: Cowboys’ Jourdan Lewis flagged after head-butting Giant

Dallas DB Jourdan Lewis with the foolish 15-yard penalty

One would think smarts should come into play when you are battling to stay alive in the final week of the regular season.

The message must have not gotten through to Dallas DB Jourdan Lewis before the Cowboys’ must-win game against the New York Giants on Sunday at MetLife.

Lewis somehow thought it was a good idea to head-butt Kaden Smith, a tight end for Big Blue.

Lewis was flagged for a personal foul on the play. And on the broadcast, he continued to smile gleefully for some unknown reason.