Find some clips of a classic movie where a character is in a movie theater, or is watching something on a TV or computer screen. Edit in sequences from a newer movie’s trailer, one that you wou;d totally not expect this character to be watching. Get it? One movie watching another. If you are good, the watching character’s emotions will be relfectd by the scenes in the new movie. Even better, bleed some of the audio of the newer trailer over the original so the sounds overlap.
For examples see: