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.

[Via I♥C]