I guarantee if he was in convulsions, that would shake anyone up who witnessed it. There’s no way you could mentally go back to playing after that.
As I posted- I was at the game Dennis Byrd broke his neck and was paralyzed. This was 1992, no social media and no internet. You could tell from the reaction of his teammates, which was similar to what you saw last night, something really, really bad had happened. It later came out that several of the Jets players could not go back into the game because they were so shaken up.
I will never forget Jahvid Best’s injury when he played for Cal Berkeley years ago. That was scary, but the play resumed once he was taken care of.
Not convulsions exactly, but really unusual.