This is one hilarious fucking movie. These actors are just playing their best selves and having a great time doing it. Agent Moulder, with the Seven Up guy, Stifler, and Jeff Goldblum's girlfriens in The Lost World.
It is about people stopping bad aliens and it is miles better than "Men in Black II" and "Ghostbusters II" which it is a combination of. Some weak improvisation and jokes don't work, but at least I liked a couple of the scenes.