Spouse and I watched “the money pit” an older movie, maybe late 80s with Tom Hanks. There was a bizarre scene when a man drove up with a song playing in his car- something about kids singing I’m a pizza munch me or eat me. Will try to find it. It had nothing to do with the movie. Made me wonder how many other movies we’ve seen over the years had little things inserted without us knowing.
https://m.youtube.com/watch?v=PttKwzQm9bw