I found a rolling shutter type thing Thta doesn't use cameras. You can have an LED light that does what the laser does, and flash really rapidly to where the human eye can't normally see it, and then a slight drizzle of rain, point the light outwards from you, and just watch the drops in front of it. I don't know how to explain it but it looks cool, but I don't think it's exactly rolling shutter, which is why I said "rolling shutter type thing"