Back when the Teenage Mutant Ninja Turtles were profitable enough to be bootlegged mercilessly and not be transformed into an alien race, movie studios employed state-of-the-art computers to give the heroes-in-a-half-shell orgasm faces. Here’s some 1992 test footage from Teenage Mutant Ninja Turtles III, in which a puppeteer from All Effects Company manipulates Donatello, who frequently appears to be on the verge of evacuating his bowels.
https://gizmodo.com/predator-teams-up-with-the-ninja-turtles-in-deranged-ru-5694802
https://gizmodo.com/we-wish-you-a-turtle-christmas-and-other-proof-that-mi-5895703
[Via I♥C]