In William Friedkin's Killer Joe, Gina Gershon's character Sharla is forced to give head to a chicken leg, a penis stand-in held at the crotch of Matthew McConaughey's anti-hero Killer Joe Cooper. Like the peeing scene in Last House on the Left, the marathon gang rape of I Spit on Your Grave, the wire torture that caps Audition and the turtle (and everything else) in Cannibal Holocaust, it is one of those scenes – a bit of celluloid that will define the film's legacy. The image of Gershon's bee-stung lips wrapped around a chicken leg is not something you see everyday or any other day, for that matter, and if you remove yourself from any emotional connection, you can appreciate this as a minor innovation in the catalog of things movies have done to freak people out, a stand-out in the canon of cinematic depravity.