Hugh Jackman was a teenage Wolverine growing up in Australia because his parents' split and near reconciliation left him with rage issues.
The actor has revealed he was a menace at school - and often a danger to others on the rugby field as he acted out his emotions.
"I was volatile," he told Parade magazine. "My mum left when I was 8. My anger didn't really surface until I was 12 or 13. It was triggered because my parents were going to get reconciled and didn't ...
"There was this perfect storm of hormones and emotion. I've never said this before but we had metal [school] lockers and, half in fun, we used to head-butt the lockers until there was a dent in them ...
"Playing rugby, my rage would come out, rage that I identify as 'Wolverine rage'. I'd be somewhere in a ruck in rugby, get punched in the face and I'd just go into a white rage."