San Francisco 49ers coach Jim Harbaugh celebrated his team's 25-19 victory over the Detroit Lions on Sunday.
In fact, the first-year NFL coach celebrated a bit too much for Lions coach Jim Schwartz's liking.
After a brief exchange and quick handshake, Harbaugh slapped Schwartz on the back before departing.
Schwartz, in turn, chased down Harbaugh and had a few words of his own before players on both teams did their best to break up the altercation.
Alex Smith tossed a 6-yard touchdown pass to Delanie Walker with 1:51 remaining as San Francisco (5-1) handed Detroit (5-1) its first loss of the season.