Dereck Chisora, a British heavyweight contender, probably thought he wasn't getting enough respect from WBC heavyweight champion Vitali Klitschko before their title fight in Munich, Germany this Saturday.
So while the boxers were face-to-face at the weigh-in on Friday, the challenger slapped Klitschko across the face with his right hand.
Klitschko was stunned but did not retaliate.
After Chisora— wearing a Union Jack bandana like a bandit's mask— was dragged away by officials and handlers, the champ— behind a red mark on his face—stared down Chisora and didn't mince words.
"I am going to hit back on Saturday," he said. "He will get his beating."
Klitschko vowed to teach Chisora some proper British manners in the fight.
"He is from Great Britain," said Klitschko, " But he's lacking in appropriate manners."
This surely guarantees that the 6-foot-7, 240-pound Ukrainian will not go easy on his shorter opponent in the ring.
It probably wasn't the smartest move by the 28-year-old Chisora— a German favorite— but at least he can say he got one shot in.
If anything, the cheap shot might bring some added interest to the bout which has mostly flown under the radar here in the U.S. The fight is not being broadcast by any of the American cable networks and will only be shown live on EPIX and streamed live by EPIXHD on the Internet.
Chisora bragged that he would take down Klitschko in the eighth but it looks like the 9-1 underdog woke a sleeping giant.
It's nothing new for Chisora since he already has a reputation for outrageous stunts.
He once kissed an opponent after a weigh-in and did his best impression of Mike Tyson by biting the ear of an opponent inside the ring.
Slapping the giant Klitschko before a fight is the kind of prank that ends boxing careers.
The 40-year-old Klitschko hasn't lost a fight in 10 years (40 KO's in 45 fights) and it's a good bet Chisora could be kissing the canvas before the final bell.