Adonis Stevenson produced a chilling first-round knockout to take Chad Dawson's WBC light-heavyweight title in Montreal.
The hard-hitting southpaw caught the champion with a swinging left hook with less than 90 seconds of the contest gone and, although Dawson tottered to his feet, referee Michael Griffin spared him further punishment.
It was Dawson' second successive defeat - and a third career loss - after he had dropped down to super-middleweight for an unsuccessful shot at Andre Ward's title.
Stevenson was also coming up from 168lbs, and the 35-year-old showcased the raw power that he had promised to bring in the build-up to the fight, when Dawson had said he had to Google his opponent's name to find out more about him.
As Haitian-born Canadian Stevenson's third successful punch landed, though, Dawson knew exactly why he calls himself 'Superman' as he ripped away the WBC strap
"You understand why people don't want to fight me now?" said Stevenson, who raced around the ring in wild celebration after his KO win. "It's a dream come true. I'm world champion, and I'm very happy.
"The game plan: use my speed, put the pressure on and, as soon as I had a good chance, put my left at the top. I caught him, and that's a beautiful punch."
Stevenson has had just 22 professional fights at the age of 35, and next up for him looks to be Britain's Tony Bellew, who insisted he was ready to face the big puncher and would show him a lot more respect than Dawson did.
"It was a punch I didn't see," said a shocked Dawson. "He caught me. That's it. He caught me with a good punch."
Liverpudlian Bellew, who settled his argument with Isaac Chilemba recently at the second time of asking, said: "Adonis Stevenson is wild and he gives you opportunities, so I don't think he's going to be a long-standing champion - especially if I've got anything to do with it.
"I'm not going to have to go looking for him, but at the same time he's not going to have to go looking for me. I will be there to meet him, I ain't going to run from nobody.
"I've got myself into a position I wanted, it's always been a dream of mine to fight for that belt and it's here now.
"It doesn't matter where this fight happens - his back yard, England, Liverpool...it's going to be a fight to watch and I'm so excited by the prospect of facing Adonis Stevenson."