In this business, tools will get broken, and occassionally lost. Unfortunately, it is not always preventable. Always take a minute to think safety first. Seeing the grinder story reminded me of my own grinder story a few months ago. A cut-off disc blew apart on me, and broke my safety glasses. Thanks to the glasses, I only got minor scrapes on my face. If I were not wearing them, I am dead certain it would have cost me my right eye.