I became a supporter of the annoying-as-hell David Letterman when I heard him say this to Salma Hayek (who appears in a cameo in this film): "Is this another one of those movies where everyone in High School gets killed?"

Salma replied, "No, this has aliens in it!"

Dave finished in saying, "Oh, so everyone in High School gets killed by aliens."

I think that's engough said ;)