In a cool bit of cross-over marketing, Portal 2, one of the most-anticipated games of the year, included an interactive trailer for J.J. Abrams' Super 8, one of the most-anticipated films of the year.  Rather than just stick a video of the trailer on to the game's list of extras, Valve (the company behind Portal 2) actually puts the player in the POV of someone on the train during the crash that was seen in the teaser trailer. It's a nice approach and while nothing major is revealed, I appreciate the originality of the effort.Hit the jump to check out a walkthrough of the interactive trailer.  Portal 2 is available now on PC, Xbox 360, and PlayStation 3.  Super 8 hits theaters on June 10th.Via Kotaku:Here's the official synopsis for Super 8:

In the summer of 1979, a group of friends in a small Ohio town witness a catastrophic train crash while making a super 8 movie and soon suspect that it was not an accident. Shortly after, unusual disappearances and inexplicable events begin to take place in town, and the local Deputy tries to uncover the truth - something more terrifying than any of them could have imagined.

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