Well there you have it.

The origin of the comic name. I had a professor in college that used to tell us this. We'd be in a lab and he'd say "anybody who forgot your safety glasses, put your hand over your good eye". Its kind of become the international sign for "hey you're doing something stupid" in the office. If you are in the middle of something that looks like it just might go bad, say lighting a mason jar full of acetylene, then anybody watching will have a hand over one eye.