Mental Floss put together this nifty list of 26 real things—including artwork, people, and even other movies—that inspired classic films like Groundhog Day, Jaws, and The Matrix. Did you know the water-shaking moment from Jurassic Park was inspired by the bass from an Earth, Wind, and Fire song? And that Monsters University was based on actual schools?

What's really fun is when the filmmakers don't cop up to their obvious inspirations. Ahem, Aronofsky.