Team: Boston Celtics
Sport: Basketball
Year: 2011
Watch It Here

The rivalry between the Boston Celtics and Miami Heat began on opening night of the 2010-11 season, but it really escalated after this moment in their playoff series that May. After losing the ball, the Heat's Dwyane Wade either lost his balance or tackled the Celtics' Rajon Rondo, depending on who you ask. The result was indisputable, though; he pulled Rondo down to the ground, and Rondo dislocated his elbow. The star point guard somehow managed to come back later that game and inspire his team to victory, but missed the rest of the series after that.