Perhaps semi-inspired by the "In Five Seconds" series of mashups, check out these bite-sized parodies of blockbusters and cult classics -- with pretty damn good voice talent to boot!
The Matrix
http://www.youtube.com/watch?v=_XEa-3eeedI
Borat
http://www.youtube.com/watch?v=mkRGlNNqmqk
SW IV:ANH
http://www.youtube.com/watch?v=ffgCUwIxtP4
Se7en
http://www.youtube.com/watch?v=yeK7QnnZ9BM
LOTR -- yeah, no kidding :D
http://www.youtube.com/watch?v=JnUvw1rzziE
DOZENS more here: (including "Ocean's 40")
http://www.howitshouldhaveended.com/
ugh, some bad Javascript on that main page, try this direct-to-the-archives (http://www.howitshouldhaveended.com/movie%20list.html) link.
Blair Witch was pretty good.
the LOTR one totally makes sense.