See, for me it was shot all to hell when it was revealed to be a big winged, prehistoric monster. If it were a real person and had some supernatural powers, I would have liked it.
That movie just started going downhill for me once they got to the diner. If they'd left out all the supernatural stuff altogether and just made it some batshit crazy trucker guy (like Joy Ride, a little), it would've been a decent movie.