You'd rather jack off a bobcat than stay here

There is an old wives tale that you should hold your breath when passing by a cemetery because an evil spirit rejected by both heaven and hell can get inside of you when you inhale. Somewhere in a carload of college kids on holiday doesn't follow the rules when driving by a graveyard, allowing a spirit of a recently executed serial killer to get inside him/her to begin a killing spree of body-jumping carnage.