Here's an animation of the hit. https://gfycat.com/HonoredLeanGypsymoth

Von Miller sees Smith is about to unload the ball, lowers his head, leaves his feet, and spears Smith square in the center of the back.

Officials penalized the hit, but did not eject Miller from the game. Ejection would have been possible under the Malicious Personal Foul rule in the rulebook.

What do you think? Should he be suspended? Fined? Neither?