This just underscores the importance of learning how to use a knife properly. Ed Fowler in his book Knifetalk II describes an incident where some guys were way out in the wilderness and a guy was trying to cut through the pelvic bone of an elk or deer (can't recall which right off hand) and he was cutting towards him. Evidently the knife went through and came towards him and he severed his femoral artery. As you can imagine, the guy was only minutes away from death by exsanguination. One of his buddies reached into the wound with his hand and pinched off the artery with his fingers. IIRC, he held on to this for several hours before they could get him to a hospital.
Years ago a good friend of mine and a tremendously experienced outdoorsman was cleaning a deer he shot with his bow. He was using one of those large old Case or Schrade folders-don't recall which-but a slip joint. He was piercing something with it and it folded up on his fingers. He saved his fingers but it was an immediate trip to the emergency room at the hospital. He just wasn't paying attention. Some knives just aren't made for some things. I think one of the reasons the Buck 110 became so popular back then was that it was a lock back. All over the US it virtually replaced those big old folding slipjoints for hunting.
I spend a lot of time in the woods alone and every time I take a knife out, the thought passes through my mind that if I sustain a severe cut out here, I could be in big trouble. So, I tend to be extra cautious and take it pretty slow. It's always a good idea to be extra cautious. I think most cuts are due to a lack of attention. You always have to ask where the knife will end up after you complete your cut.
As for loaning your knife, most people don't know how to handle a really sharp knife. Knifeknuts tend to get used to being around them but that average joe who carries a knife usually carries a dull one they haven't sharpened in a year or if they did, did a poor job of it. I'm getting to the point where I don't even like to SHOW people my knives because they will do something stoopid with them, like drop them point first on the concrete.
I'm not sure I believe the old saw that a dull knife is more dangerous than a sharp one. Over the years, I've seen too many really deep cuts caused by razor sharp knives.