The students were doing research on a paper about a "person, place, or thing important to a Spanish speaking nation." We were in the classroom, and the kids were working on laptops. While wandering around the room, making sure kids weren't playing games or on Facebook, I saw one girl's topic was Machu Picchu. I asked her, "Picchu? Isn't that a Pokemon?" Long story short, it turned out she was a foreign exchange student from Brazil, and the reference was completely lost.
Later, a kid asked if he could get his headphones from his locker, to listen to music while working (which the teacher had told me was allowed). I convinced him that I didn't know what headphones were.