Don't say we didn't warn you:: The aliens are coming, and you better get ready (and just so you know, they're coming in a 28-mile wide spaceship, powered by nuclear fusion, so it glows from within).
Or maybe the aliens have already been here, and we're all irretrievably marked by them, presumably for easy pickings when they come back.
Of course, this assumes we last that long. You know, with the giant tidal wave and everything.
That is assuming we don't all kill eachother over our near-empty oil reserves. We're talking Planet of the Apes time.
Fear not, however, because the government is monitoring all of our thoughts, and will be able to stop us and/or kill us before we do anything rash.
There...don't you feel better?