[gtmitchell]

That brings back memories. One of my first research projects in school was doing sketchy things with a Quanta-Ray Nd:YAG laser. I remember the distinct 'tack-tack-tack' sound of the Q-switching at 10 Hz which I used to create a laser-induced plasma right around eye level.

Fortunately I had the proper goggles on but was always terrified of catching a stray reflection and blinding myself. Now we live in a world of dirt-cheap high-powered diode lasers, and when I see all the stupid things YouTubers do with them with almost no discussion of proper eye safety, I wince.