Done the wire wheel on the grinder into the eyeball thing!! I always use safety glasses with it. But one day I pluged it in and hit the trigger just to make sure it worked (with out the glasses) and WHAM! Thought I rinsed it out. Next day it really started to bother me. Went to the doctor and he got it out but it had left a rust ring in my eye ball. So he a to drill out the rust with a small burr tip bit!!!!! Lesson learned!! Anytime you put power to a power tool put the glasses on!