“I don’t know if you’re familiar with CREEM at all,” I begin to tell film producer Sean Cunningham in his spacious office in a sleazy building off Times Square. “It sounds awful,” says Cunningham.

Maybe, pal, but it ain’t nearly as awful as Last House On the Left, Cunningham’s Grade D gross-out, a staba-thon filmed in bloody hack-a-rama. I’ve seen it twice, and at one point I was convinced it was one of the greatest movies every made. Now I’m not so sure, though it’s certainly one of the most truly frightening movies of its ilk to come around in years.

Basically, it’s about how two teenage girls on their way to a rock festival (to see “Bloodlust,” the group that dismanties live chickens on stage) stop in the bad part of town to score some grass. They fall into the clutches of four escaped criminals: Krug (David Hess) and Weasel (Fred Lincoln), two psychos who’ve been doing time for the murder and rape of a priest and two nuns; Sadie (Jeremie Raine), a sadistic dyke who looks like a squat Tricia Nixon who drank too much Romilar; and Junior (March Sheffler), Krug’s drug addict son.