Heavyweight (275).
It's a long story, but I lost my spot at the 189 lb guy because I dislocated my elbow before the duals started that season.
The guy who went down from 215 to 189 was on a roll and the guy who went from heavy (he was 230) down to 215 ended up placing in state, and I could dislodge him from 215, so I was bumped to heavyweight.
I wrestled a guy who eventually went onto Ohio State as a defensive lineman up in Alliance.
I'm not saying it wouldn't have staggered him. But watch his left leg.
He kicked it out like, well I don't know what would have caused that motion.
But I DO know that this headbutt would NOT have caused such a motion without "help" from the other direction, or the player himself. Simple physics guys.
To be devil's advocate for your view: The Italian could have known whatever "secret" thing it was about Zidane that was sure to set him off since Zidane played in the Italian league for a few years. I bet he wanted to get a reaction out of him with whatever was said, but probably didn't think it would be a head-butt (from a butthead none the less).