There's this bit in the movie Just Like Heaven (2005) where Napoleon Dynamite works in kind of an occult bookstore. He's having a conversation and a customer asks where the UFO section is and he says "back and to the left. Back, and to the left."

That is so clearly a JFK assassination reference that I suspect they changed it from "JFK" to "UFO" in post. BT neither of those things would have a section in that bookshop, so I dunno.

19 years later, that's literally the only thing I remember about the movie.