Looks similar to a prototype foam machine I built. It uses an air compressor to force air into a bottle of water/detergent, which is then forced out, causing it to foam.
It's close to be fair but not quite... I like how yours is clearly much thicker (I would definitely give it a go!)! But then I like how the video has it pouring slowly from above so the victim can be left to suffer... I don't want them to suffocate haha!
foampie said: Looks similar to a prototype foam machine I built. It uses an air compressor to force air into a bottle of water/detergent, which is then forced out, causing it to foam.
Does look like their machine also uses compressed air. They use a larger hose and a container at the end. Both these additions will serve to slow the flow of foam and allow more of it to build up into a mound, before dropping out.
So a compressed air solution will probably give you what you need; just use a larger hose.