I immediately thought of this one. Don't think it has been posted.
Lawler Manhoef.
This is what I came to post; Reem said this was the only knock out he felt sorry for or said it was hard to watch or something. Looking back at the gif it doesn't seem too bad compared to others as Fujita seemed to be moving, I remember it being far more brutal for some reason.
Also these:
They let him fight after that