Dark Side of the Moon
"Dark Side of the Moon" on Google Video
This is one of my all-time favourite mockumentaries.
It's subversive, witty, fun.
there's a 20mins pretext on the moon landing enterprise as such, and then it really gets going :)
I mentioned it once in sievetronix lj (refer there for links and a description if you refuse to watch 50mins of video without knowing what to expect) and he now spotted it on google video.
cheers bill :)