I recycled my Halloween show from our previous house in 2018..
Same show, different house! There is some scaffolding there for some window repairs we're having done, but so far, it's been a big hit. The laser is across the street on a neighbor's deck. This was all very last minute (like, today) so I didn't have time for sound effects or setting up my fog machine. Next year though I'll have lots more.
https://www.youtube.com/watch?v=h3KrkTW0zXM
At one point a little boy said twice very loudly "LIGHT TRAVELS IN A STRAIGHT LINE!!"
side note: This is the projector that SaltyRobot built for me out of a Laserworld box (I bought from Francis at FLEM), some higher output diodes I bought, and the scanners and x-laser drivers I won as a SELEM door prize a few years back.