Spoilers ahoy...
So, the other day I'm at Hollywood Video and decide to rent some flick called "Employee of the Month". Starring Matt Dillon, Christina Applegate and some other feller I can't name. And some other blonde chick. Anyway, the box called compared it to to the Coen Brothers which is probably one of the more insulting things said about the Coen Brothers and that includes the reviews from that Clooney/Zeta-Jones vehicle. Besides being plodding and unamusing (I think there was one line that made me laugh), it contained one of the more annoying "we're so clever" devices I'm come across in cinema: the plot twist towards the end is explained via cut scenes during the credits that contain plot not shown during the course of the actual movie.
The other film that I immediately think of having done this was "Wild Things", the one with Neve Campbell and Denise Richards. However many minutes of telling the story one way then showing that you were wrong all along! And if you'd only known about this scene and this scene and this scene, you'd have known the *real* story! There's nothing clever about that. Hell, any idiot can come up with a story, throw in a seemingly random twist at the end and then retroactively explain it. The real trick is to give the viewer all the clues during the course of the story and see if you can mislead them in a way that makes them say "Ah! Of course!" in the last fifteen minutes.
Oh, and everyone dies in the end in the most predictable manners possible. I warned you there were spoilers.