I came across this a little while ago, and it is an absolutely insane (yet awesome) splicing of damn near every Sci-Fi movie, well, practically ever.
And yet it still makes sense.
Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7 (6.5 my ass)
Part 8 (6.5.2 my ass)
Count the references folks.