The worst thing I ever went through was making a Queen Anne Table for our living room. Had to cut a 3"x3"x5" blanks down to 1 3/4" square. Had to remove the riving knife and guard on the table saw to do this. First 2 went perfect as did the first cut on the 3rd piece. Second cut, blade grabbed it, threw it and my left hand went in to the blade. Funny how you can remeber the teeth as they pass through your fingers. You can almost count them. Saved the three middle fingers on my left hand although now they are shorter by 1/8 of an inch. Will never be right, and years later still have issues. Greatful I have them and can still work but a huge lesson learned in the process. No matter how careful you are things happen. That was 4 years ago, the table is still not finsihed. But being kept as a reminder of a second of not paying attention.