I don't think I'm alone when I say that I Am Legend was a little bit of a disappointment. Although there were a lot of good things going on (mainly in the performance of Will Smith), it wasn't a great film, and something was missing. Based on Richard Matheson's sci-fi classic, Smith stars as Dr. Robert Neville, a scientist who is immune to a "vampiric plague" that has wiped out humanity. Now an alternate ending to the film has been leaked to the net (thanks to Slash Film for the heads up), which you can check out above, and it gives you the chance to play 'What If?' If you haven't already seen the film, you might want to stop reading now, because I am about to give you one heck of a spoiler.