http://trentarthur.ca/making-art-a-little-less-precious-gallery-in-the-truck/
With what looks to be very little ceremony, art is displayed in a removal truck in Peterborough, Canada in 2012. Using the interior as found, it gives a certain 'real-world' feel to the space.
Plus, with the ramp, it is accessible to all!
A pop up, cheap, flexible and dispensible space for drama and events. A really simple, but so effective design.