Advantages of Glasses
The ballast on one of the fluorescent light fixtures in the garage failed. So I'm up on a ladder, replacing it, and while stripping the wires, the tool I'm using comes back and cracks the right lens. I shudder to think what might have happened if I didn't have glasses on.
UPDATE: The good news: I was just a day or two out of scratch warranty, and they covered it anyway, so at least I won't be putting any money out of pocket to get this fixed. (This damage was to "scratch" about like GE minigun is to rifle.)