10 Awesome Wrestling Moves WWE Stars Aren't Allowed To Do
9. Diving Headbutt
Headbutts of any kind in professional wrestling are incredibly dangerous, and you only have to go back as far as April, and NJPW's Shibata-Okada match, for evidence of just how badly they can go wrong.
The diving headbutt can amplify that risk a little further, since you have even less control over the power with which your skull bounces off your opponent's body (and, if you get your angles wrong, you could wind up hitting the canvas instead).
After Chris Benoit and (to a much lesser extent, obviously) Daniel Bryan, it's unlikely anyone will be allowed to perform this move on the regular again. And, honestly, it always looked like it hurt the person doing it way more than the one receiving it anyway.