Never, EVER point a laser at anything in the sky, or in the direction of a person’s face. You can blind people, and if theyre flying a plane or helicopter (or driving, for that matter), you can kill them. And whoever they might crash into if they happen to crash. It is a federal felony in the USA, there may be other similar laws in other locations.
Typically low powered lasers aren’t visible like that, but it doesn’t matter. Just like you always treat a firearm like its loaded and never point it towards people, treat every laser like its high powered and never point them at peoples faces or at helicopters or planes.