Do Not Look Into Laser With Remaining Good Eye

So went a sign posted on someone's door at the U of O. I can't recall who, but he was obviously a laser jock of some kind. I was going to write "laser jockey," but that phrase seemed too silly. I imagined a small man, colorfully dressed, applying a crop to the side of a big ol' Spectra-Physics Argon ion laser.

I've gotten a laser beam or two in the eye, but never anything serious. I recently built a little experimental setup wherein I used a Helium-Neon laser (that's just a little tube of He and Ne gas with some cool excitation and mirrors around the tube) to line everything up. I noticed that my wedding ring is extremely, extremely, reflective. So much so that if I use any high power lasers, you bet I'll be covering that thing up for the duration of the work!