Yeah, late one day in the lab, tired, aligning lasers, I used a mirror to check alignment because I knew I shouldn't put my eye in the path - so, like a complet

Yeah, late one day in the lab, tired, aligning lasers, I used a mirror to check alignment because I knew I shouldn't put my eye in the path - so, like a complete, overtired idiot, I put the path in my eye instead. And thought, Hey, that wasn't very smart! And Wow! I am (temporarily) blind. It wasn't an eye-threat-level laser. Thankfully. Which is why one wears bandgap glasses when working with those: it's SO easy to mess up!