I know this isn't particularly as trad related as you guys', but I wanted to try my hand at making my own arrows from straight grained Popular boards I had bought from Lowes. Well instead of splitting them down to 3/8" squares to plane off the edges I decided to use our table saw. It started off well, cut the boards to 36" lengths, set the bridge to 3/8" and started ripping the boards, got about halfway through the board to the point of using the push stick and not thinking I placed my thumb against the board to keep it pressed against the bridge and hit a knot.
Well needless to say, the board kicked and my thumb slipped right into the blade! Luckily it just barely caught the tip of my thumb but it cut a gash the width of the saw blade and tore all the meat and flesh almost down to bone. Didn't hurt until 30 minutes later. Didn't go to the doctor, just peroxided it while it was still numb, and wrapped it up.
Needless to say I gave up on homemade arrows using the table saw and I am going to split them from now on! Got a cool scar out of the deal, and killed the nerve in the tip of my left thumb (no longer have any feeling), but it hurt my pride more than anything!