Well, I finally answered that age old question "how could anybody be stupid enough to do that?", and managed to put my fingers into my nice new Freud Dado saw. The good news is the surgeon was quite skilled and it looks like I will retain the correct length on all of them, although they will look pretty ugly. Cutting a 3/16" deep dado in a piece of 2x4 it started to lift up so I went to put my hand on it to hold it down while pushing it into the blade with a stick. It was already completely over the blade and over an inch and a half thick, so I didn't see the danger. It happened so fast I still don't know exactly what took place, just that my ring finger and middle finger on my left hand were suddenly hamburger after the board kicked back.
Anyway, use that safety stuff folks, it really does happen.