Hand Planing Bamboo backing. That stuff gets very sharp ,and it dulls the plane quickly. The plane skipped half way down the piece and left my hand that was guiding it to run a couple inches down the edge.Nasty gash, lots of blood. Wrapped it up and continued working. I don't remember how it happened butabout 10 minutes later ,I cut the other hand just as bad. That signaled the end of the bow making for the day. Don't work when you are tired and in a hurry, that's when accidents happen. The bow is still not finished ,more than a year later.It's all glued up and ready to tiller , I'm just afraid it's cursed.