If you watch, Crowder gets underneath him. I actually think crowder walks off laughing after the whistle gets blown
https://youtu.be/axJswI60JwE
I did not see that at all.
I've watched the play over and over about 10 times, and to me the look on Crowder's face is one of horror and regret.
Crowder is a tough guy and is no shrinking violet, but he is not a bad dude. I wouldn't be at all surprised if he can't sleep tonight from the guilt of knowing he caused this - accident or not.
I don't think even the most dirty of NBA players could witness an injury this horrific and smile about it, no matter who is on the other end of it.