Sunday's Cavaliers-Rockets matchup included many heart-pounding moments (the Rockets won a close game, 105-103), but none as physical as a close encounter between two of the NBA's biggest superstars, James Harden and LeBron James.

The game was intense, but, during the third quarter, things got more than just a little chippy when Harden fell to the floor and something unexpected happened to King James. To put it simply, Harden kicked LeBron in the groin area to the surprise of many, including LeBron himself, who appeared to be in obvious pain. Could this spark a new rivalry between Harden and LeBron? Only time will tell.