So, very recently I was at a wedding the reception of hich was adjacent to a major international airport. As the celebrations turned to evening and the DJ started up, on came the laser machine. Now this particular venue has roof windows..
just some cursory research shows that a 30MW green laser, such as would be used can be purchased of 144.00 and an 80MW for 240.00
now this set me to wonder, as how many inadvertent events actually occur and how many people and venues that operate such equipment have any inkling of the inhenerent dangers.