Nice...
I've got two I can recount, but they're not strictly handyman accidents.
When I was serving my apprenticeship, we did a bit of practical and a bit of workshop - one of the lads in our year managed to lose a finger while working on a lathe. I think he made the mistake of continuing to use it while turning around to talk to someone...
The other was an office accident, and this might top them all (sadly)
This happened either just before I started orvery shortly afterwards in another local office (now closed). We had some work experience kids in with varying levels of handicap, and someone thought it would be safe to let one of these kids use the shredder. Not even the manufacturer believed you could get a whole hand in that far :-/