I used to own a bunch of 750 - 5000 mW portable (pen, and a plugin) lasers. Historically, I've used them for stargazing (i.e. pointing out stars for other peop

I used to own a bunch of 750 - 5000 mW portable (pen, and a plugin) lasers. Historically, I've used them for stargazing (i.e. pointing out stars for other people to look at), burning / igniting things I don't want to get near (and where I'm too lazy to remote ignite), and engraving.