I don't think people realize how hot a gun barrel can actually get. I've heard about Swiss soldiers firing their K31 rifles rapid fire, stacking them (using the stacking swivels so 3 rifles form a tripod), then standing around them to keep their hands warm.
As for the video, I wish I could find the image a friend of mine was telling me about with a soldier standing holding an AK with his hand up and a caption that said something like Keep that crap off my AK.
Three? No eye protection, finger on the trigger, the guy showing him how to load may not have hearing protection, but I can't tell. Am I missing something?