Sometimes a movie is a good idea. A board of directors assembled somewhere or a couple of screenwriters or producers had a beer, and a very good idea appeared. I remember sometime in the late 80s seeing a video game called "Alien vs. Predator". At the time it seemed like a lousy idea. After the first AVP movie came out in 2004, it seemed like a good idea. Who can account for changes in taste? Having just watched the movie for the second time, I can report that it's still a good idea. In fact, it may be necessary in order to sit through the entire movie to pinch yourself, remind yourself of just how good an idea it is.