Here is a quick grab shot (taken through my truck window) of the film crew filming Unstoppable. Unstoppable stars Denzel Washington and Chris Pine and is expected to come out in November next year.
I wont go into the details, if your interested, look it up on imdb.com
I see 4 cameras filming from the inside of the cab. This unit is a drone and has scaffolding and no nose. I believe Denzel and Chris are in the cab.