Everything from TV to models have intertextuality in them at some level, sometimes this a anecdotal lines from other movies with that actor or references to other media or film. It's used so the audience has something extra that they can laugh along to, by making them feel witty for understanding the link. An obvious example of intertextuality is the use of the band Kiss, in the film Role Models, when the characters dress up as the members of Kiss in the final scene. Although one of the characters keeps going on about Kiss throughout the film, some less musically inclined members of the audience still would not see the connection between their facepaint and the band. Also in the obvious region of intertextuality, in the Expendables, Stallone makes a comment about Schwartzenegger wanting to run for president. This is obviously a reference to Arnie's job as governer of California in real life.

These examples are obviously deliberatly put in my the writers, though most cases of intertextuality are done without the writer's knowledge. Infact every single story contains intertextuality because it uses bits of other stories to help mould it, and in some cases, to help create the plot. I'm not going too far to say that most Hollywood films follow the same sort of rough storyline that must have originated by one or two films to begin with. The same thing can be said for models. A model is a model of something and therefore is rife with intertextuality, a model is infact the perfect tool to use when describing what intertextuality is because it is itself intertextuality.