The "technology vs. horse" scenario that Donald tells Charlie he is putting in his screenplay was done in the movie 'True Lies'. Technology won, by the way. See more...
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Continuity: When Charlie, Donald, and his girlfriend have breakfast Donald puts a pot of coffee on the table. In the next shot the pot has moved to a different place, and the coffee is sloshing around in the pot. Then Donald reaches for the pot, obviously to pour coffee for his girlfriend and himself, and after a brief shot at Charlie the pot is put down and almost empty, but the content is absolutely still. Then the camera cuts briefly to Charlie, then back to Donald, and the pot is fuller and the coffee is again slightly moving.