Jim Harbaugh
In a game against the Detroit Lions (49ers win), a postgame handshake made national news. In the game, Harbaugh challenged a scoring play. However, under NFL rules, scoring plays are always reviewed. Detroit coach Jim Schwartz reportedly screamed a curse. After San Francisco won, the coaches went to midfield to shake hands. However, Schwartz accused Harbaugh of "smacking his back and shaking his hand too hard." Shartz chased Harbaugh down the field, and they had to be separated. This is often called "The Handshake Game."