After this rare event that happened at the Bengal's/Bills game, a friend posted this explaining what commotio cordis is.

For those interested you can read more about in the article below. It was written by Prof Chris Semsarian AM
@CSHeartResearch & posted by my friend @DubiousPod on twitter.

https://www.heartrhythmjournal.com/article/S1547-5271(11)00826-5/fulltext#.Y7Ohs42UHCA.twitter

#CommotioCordis #HeartRhythm