Flashlight Experiments is about “multi-exposure” with a flashlight in the hand: Mount the camera on a tripod, set it to Bulb and start flashing around in the dark.
If you liked that one…
… then you’re really seem to love the weird shit. If you want more double/multiple exposure stuff, check out the darkness of Dark Lake, Deep Woods, where the owls for sure are not what they seem! Alternatively you could watch some blue skinned people in the series Jerusalem Turquoise. Or you take a step on the wild side in Desert Strange? It’s up to you, mate.