The Big Cahuna: National Lampoon's Vacation
What's an '80s summer movies marathon without the ultimate summer movie: National Lampoon's Vacation. The secondhand embarrassment that entails, we all know, is extremely painful, but worth it for the out-of-this-world laughter that Chevy Chase evokes. Be sure to buckle your seat belt, because Vacation will be the ride of your life and the perfect ending to your marathon-and the perfect start to your summer!
[Photo via Vacation: The Movie]