Daniel Bryan was a moron about his neck and head. Same situation about his headbutt, but Bryan's tries to connect with the skull of the opponent with his, jarring the neck a lot more. He does it more, and he has a smaller frame, thus more tendons to stress.
I still get mad when I think about that crazy ladder headbutt contest he had with Ziggler.

Dude has no chill or self preservation. It's why he's loved, but also why he's not going to get another fair shot in the E, and the crowd isn't going to accept it.