Similar thing happened to me at the cinema last week, there was about 8 people total in the room, 2 middle age women come in and sit directly behind me. At the start of the film (Captain Marvel) it says ‘For Stan’ on the screen and the following interaction between them happened:
Lady 1: “ooh that must be for Stanley Kubrick”
Lady 2: “I think it’s for Frank Lee”
Lady 1: “but it said for Stan?”
Lady 2: “oh yeah, you’re right. It must be for Stanley Kubrick, I should know that.”
One of them kept kneeing my chair every 5 mins so I ended up just moving seats, it shouldn’t bug me as much as it did but who sits near someone in an empty cinema screen? You have the whole room to choose from. It’s not assigned seating either.