The silly ritual of the coaches' post-game handshake got taken to a new level Sunday when the odious Jim Harbaugh celebrated his 49ers victory a little too enthusiastically while shaking the hand of Detroit Lions coach Jim Schwartz.
Schwartz took after him, entertainingly.
It didn't escalate to fisticuffs, but that doesn't mean coaches haven't squared off before. Here are five of the best:
5. Lindy Ruff & Brian Murray, NHL
We are shocked to find an NHL clip. This came after a brawl between the Buffalo Sabres and the Ottawa Senators, and the two coaches apparently decided a frank exchange of views was needed as to which team was at fault.
Bonus: F-bomb clearly dropped
Double Bonus: The rinkside reporter standing right between them, staying as stiff and motionless as a Buckingham Palace guard.
4. NBA Development League
Eric Musselman and Kevin Young have words. One gets knocked to the ground by his player who is attempting to be a peacemaker.
3. Herb Brooks and Jacques DemersMiracle on Ice's Herb Brooks takes on Jacques Demers. Monsieur Demers is now a Conservative Party Senator in Canada's Parliament.