The hunter's lucky that he saw the cat before he charged. Lucky the cat didn't get him from the back or from the top. Would have been game over at that point.
At the point that he realized the kill was covered - he should have backed out, but I kind of understand his curiosity ... How often do you get to see something like that first hand?
I don't really blame the cougar ... He was just doing what comes natural to him ... Kill Elk ... Eat Elk ... Protect Killed Elk ... Eat Elk ... Repeat as necessary. Its something that might have been prevented and for that I too am kinda sad ... the other part of me thinks ... One less apex predator = more deer and elk which isn't a bad thing .. Unless you're the PA Game Commission (Sorry - can't help but take a shot at their "deer management program" every chance I get