Jim Schwartz
In a game against the San Francisco 49ers (49ers win) in 2011, a postgame handshake made national news. In the game, San Francisco head coach Jim Harbaugh challenged a scoring play. However, under NFL rules, scoring plays are always reviewed.  Schwartz reportedly screamed a curse. After the 49ers 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."