I got a beautiful Gränsfors Bruk Liten Skogsyxa (little wood axe) for my birthday a couple of years back. I live a few hours drive from them nowadays as it happens.
Gorgeous bit of kit but sharper than you might be used to.
I was practicing left handed wood splitting (I'm pretty good with my right). I was simply resting the axe on the end of the log as I assessed where there might be a crack already opening up in the drying wood. The head of the axe just slipped off, and fell, without force, about two inches onto the tensioned tendon at the back of my right thumb - neatly severing it.
Little blood, almost no pain. Very clean wound. Some pain as the tendon disappeared up towards my wrist though.
I'm no superhero but I've had my fair share of toe-curling injuries over the years from sports and martial arts and I can cope pretty well. However, I had to lie down and nearly passed out. The knowledge of how seriously I'd just managed to injure myself was one of the most unpleasant things I've experienced. To clarify, having no useful thumb is counted as a very serious disability in terms of the scale of the help available in most developed countries.
Of course, a drive to a very well equipped Swedish hospital and some fun-to-watch surgery as the surgeon lengthened the wound considerably to retrieve the severed tendon, and all was well again (after six weeks in a painful cast with my thumb held hard backwards).
Two years on and with a fair bit of physio I have most of the extension range in the thumb and the grip strength is about what it was.
So - gorgeous tool but be very aware that they are razor sharp and require no force to slice though flesh!
Be careful with such things in the back-country. ;)