I don't have a link, but some ways to tell that it's fake by computer imaging include the fact that the camera moves in a steady rate past the accident. If it were real, I don't think they would just keep walking. Also noticed the way that the entire view shakes from when the truck crashes. Genuine camera footage would not shake like that, rather it would shake as if the cameramen flinched.
What takes a nice steady tracking shot of a car wash?
Of course... I've never heard of anyone try'n to video an empty carwash.... then you hear, what sounds like a bunch of people... and the camera man was steady.... Good Fake though....