Ever since I was a kid, whenever I was on a car ride, I'd imagine a favorite video game character of mine running parallel to me and doing parkour over the obstacles on the street. A few years ago, I saw a post online that described almost exactly the same daydream, and several people had commented that they too had that same daydream, with the specific details varying between people. My project is to try to uncover how and why we seem to have recurrent "collective daydreams," and what other examples of them there are. This has led to a broader question to answer: when and why do we daydream?