Do you remember that original teaser for Super 8, in which a train crashes and something lets itself out of a train car? This is like that, except interactive (thanks, Source Engine!), and it takes place from the point-of-view of someone inside the train. You can find it in that copy of Portal 2 you've undoubtedly already purchased or, if you're still stuck at work like we are, watch a video after the break.
