The comedy hit at last year’s HUMP! was a mock documentary about centaur sex called Mythical Proportions. Three actresses confessed their sexual fantasies for centaurs, intercut with intricate stop-motion animation of a female mugging victim being saved by a centaur emerging from the fog, another woman riding on the back of a centaur and getting so aroused she shimmies up the back of his neck to sit on his face, etc. The writing was hilarious, the animation mind-blowing, and tonight the local outfit that made it, Cro-Magnon Pictures, is showcasing never-before-seen work as well as its award-winning centaur porn. (Rendezvous, 2322 Second Ave,, 6:30 and 8:30 pm, $8 adv/$10 DOS, 21+)