As I have only one good eye (was born that way), I have learned to be very careful to remember to wear protective goggles, etc...
Now if I could just remember to wear my mechanix gloves more often.
This past Saturday, I managed to lose my grip on, and sink my 4" electric grinder's wheel into, the "knuckle" of my right thumb. Due to the lost material there, had to go to the emergency room to get it stitched up. The Mrs. was not amused.... I chunked it down to the bone!
Just a little cut, area-wise, but boy, was it deep!