Lionel Messi is one of those cooler players on the field. He's hardly angry. And doesn't get into a lot of fights. This time, he lost his cool in a major way. In a friendly between AS Roma and Barcelona, Messi approached Roma's Mapou Yanga-Mbiwa and headbutted him. Then he grabbed him by the neck before getting pushed away by the referee.

What gives, Lionel?

Messi was apparently upset when he got hit on the shoulder. To which he later answered with a goal.