Couldn't help thinking of my boss when I was reading this, a month ago he managed to slice his leg open with an angle grinder.
There was that much blood it soaked through his jeans, and down into his boots, didn't go get it stitched up though, just kept working, wouldn't even let anyone look at it.
Three days later in hospital with blood poisoning, they had to scrape the the inside of the wound out to clean it and leave it open to allow it to weep for a week before they would stitch it up.
So peoples if your going to do any home surgery, make sure the angle grinder disc is nice and clean.
Oh and thats not the worst thing I have seen him do, ladders and large machinery give him trouble as well.