Robert Gribbin

A pretty young teacher and four of her pretty students take a minibus to some Navajo ruins, little suspecting another kind of ruin awaits. A trio of bikers begin to flirt with the gals, and when their bus breaks down, they helpfully tow the vehicle to a deserted shack. The chief biker, Al, chews up the scenery, kills folks, and rips off the teacher's clothes before raping her. The poor schoolgirls are also in for their share of abuse. (imdb)

Runaways are attacked by evil beings from the far past. (imdb)

Howard is a mild-mannered young man who drives a truck for a commercial laundry. He's also a mother-obsessed psycho who picks up young female hitchhikers, rapes them and kills them. As the bodies start piling up, the police finally begin to investigate. (imdb)

Seventies' sexploitation comedy that follows two suburban high-schoolers as they spend their summer being chased by men and volunteering with the police department