Mine would have to be "Sleepaway Camp" an 80's movie with a production value of about $25,000. It was one in a legion of cheap horror flicks. But I have a personal connection to it because we bonded over it at my camp, which yes I know is ironic; we even considered Angela, the main psychopath of the film to be an unofficial camper. also it manages to stand out because of the most unexpected twist endings in film history
also if anyone answers with "Snakes on a Plane", they have clearly not been watching enough 80's slasher films
also if anyone answers with "Snakes on a Plane", they have clearly not been watching enough 80's slasher films