That is a chasedown block with authority.
Washington’s John Wall tracked Miami’s Josh Richardson down and turned his layup attempt into an emphatic rejection, sending it off the backboard so hard it went out of bounds before anybody could get to it.
That wasn’t enough, the Heat beat the Wizards 106-103. That loss puts Washington in the four seed in the East, a full game back of Toronto for the three seed, which means Washington likely finishes fourth (and would have to face Cleveland in the second round). The win has the Heat in a tie with Chicago for the final playoff slot in the East.