yes, i know it's oddly specific

okayokayokay, so you know that scene in dumb and dumber where harry's upset stomach makes that weird noise because lloyd gave him laxatives? What sound effect was used for harry's guts? I'm curious because it sounds like the roar of some sort of animal. I'd love to know the source of it. I heard somewhere (about a year ago) when i re-watched the clip, that the sound effect came from the thing (that scary movie from 1982) And the thing's roars and screeches were in fact animal noises.