Pacers forward Lance Stephenson is known for his hyper-aggressive style. On this play, he took flight, made a circus shot, and landed hard. Stephenson left the game with lower back soreness (after making the free throw, it should be noted). Pacers TV reported he's doubtful to return.
Scary fall, but an awesome shot, and luckily it looks like he didn't suffer any head or neck trauma from the fall.