Laser vision show leads to retinal damage and vision loss among party goers
Russian health officials report that party goers at an outdoor rave near Moscow lost partial vision after being exposed to lasers when weather resulted in use of large tents. Lasers were partially refracted into party goers eyes off the tent surfaces. Ordinarily the laser beams would beam into the atmosphere.
Might be worth warning your laser workers or potential laser show party goers about this risk.