Back in high school when I used to have time to read a book a day, I noticed this a lot more. I would read The Firebrand and then the following week in English class, we'd be reading "Women of Troy". Or I'd pick up the book Jurassic Park and two days later, I'd see a trailer for the movie.
Friday night, Jay and I watched Cannibal: the Musical!. Saturday night we watched the season 5 finale of Buffy the Vampire Slayer which contains a scene that starts with Xander saying "Spedoinkle!" In case you're not familiar with the first movie, this is a catch phrase/word throughout the film. If we hadn't seen Cannibal first, we never would have caught the reference. Funny how things come together like that.