In his video he also uses game calls. These are whistles that mimic the calls of animals. They are available for various animals like wild boars, birds, foxes, and rabbits, and when you blow on them, you hear the animal’s call. Hunters use them to lure animals closer before shooting them. Blowing on such a game call into the slime creates a kind of strange, bubbling, animalistic call. It could easily be the vocalizations of a dinosaur or dragon. But maybe a gurgling and slimy dino in this case.
The video inspires me to get a few game calls myself because without the slime they can also produce very useful sounds that I can use during foley recordings. I watch another YouTube video featuring a hefty German hunter demonstrating how to realistically mimic the grunting of a female wild boar in a way that the male would starts running towards the barrel of your gun. Sitting on a folding chair that almost gives way under his weight, he demonstrates the sounds in a forest. The video unintentionally becomes hilarious. I imagine a male wild boar in the woods hearing the call and thinking it’s a female wild boar. Eagerly, he runs through the forest towards the supposedly sexy female, only to find the German guy sitting on a folding chair blowing on a whistle. That must be a disappointment…