It could end up a serious injury...
https://www.facebook.com/reel/998989645466027 The man is big, but everybody's jaw is a vulnerable spot, no matter how big they are... The key ? That kick knocked his jaw sidewise..
When my grandson was competing in MMA, he had his wisdom teeth extracted. It seems intact wisdom teeth invite a knockout !
Don't ask me why, but it is commonly done with MMA fighters..