Here's a link if you're interested in this sort of thing and you have a strong stomach.

http://community.woodmagazine.com/t5/Top-Shop-Tips/Table-saw-guards-WARNING-GRAPHIC-CONTENT/m-p/60642#U60642

Those things can really bite. I guess that's why they the points on the blade teeth. Wish I'd had these pictures in past years to try to scare the high school guys into following directions. Getting them started on the saw was a scarey deal. When I told my dad I had 25 guys in class the first thing he said was "what? that's 250 fingers to watch." I'd gotten trained to look anytime I heard a machine start to see who on it and then decide if I needed to yell, run or just watch and see if they knew what they were doing. 25 years of working with kids and machines and no fingers lost, but there was blood and stitches.