I was adjusting the bottom sealed bearing blade guides. I start the saw for just a sec so the blade is moving, but not on. Allows me to see that the guides are adjusted right, and close enough to the blade. Done it a thousand times, but obviously, I'll have to rethink this. Thank God the saw wasn't running. It's not really a cut... move like it tore a chunk outta the end of my thumb. F'ing hurts. First mishap in 10 years of bowmaking. Touch wood.