Although there are a thousand different forms it could take, there are two interesting depictions of it that I've found on Youtube.
The first is a clip from "Rollover", a 1981 film where the dollar collapses following a massive withdrawal of dollar funds from American banks by the Arabs, following some type of scandal in the gold market.
Second is a documentary made in the Netherlands. It is centered primarily on how it would affect Europe and has some very interesting interviews, including Peter Schiff.
Part 1 (of 6): http://www.youtube.com/watch?v=SrNl1Lkho0c