At a truck series race in Canada on Sunday, NASCAR driver Max Papis collided with another driver, Mike Skeen while they were battling for second place.

Skeen's girlfriend was so angry about it, after the race, she walked up to Papis  and slapped him.  Watch,the slap is near the end. At the beginning you see somebody reach into the truck and try to attack the guy.

Papis claims the slap actually dislocated his JAW.  It didn't seem like she hit him that hard, maybe he has one of those glass jaws.

"This crazy lady comes shouting at me, and I had no idea, didn't even understand her, she just started shouting," Papis told ESPN.com some four hours after the altercation at Canadian Tire Motorsport Park. "And all the sudden, she took a full hand -- and she slapped me so hard. I'm not kidding. My jaw got dislocated and my left ear is still ringing, big time."

"What do you do? You don't hit a lady," Papis said. "I was in disbelief. Complete disbelief. If she would've closed her hand it would have been a bad punch, because she hit me so freaking hard. I went to [Skeen] and said, 'I guess we know who's the man in the family here, because the guy didn't even have the [guts] to talk.' "