When David dials the phone he says the number is scratched out and we see it all covered in black. But when he dials again the black is gone and we can see most of the number; (213) 783-xxxx.
At 10:54 when the antagonists is filling the car there is no damage to the rear of the car. If a truck travelling at over 80 miles an hour rams a car it would cause some damage to the rear of a car in front.
At 44:13 when the Hulk sends the car into the truck it hits it and explodes head on. The following shots are clearly stock images from the movie The Duel as the truck continues the car has mysteriously changed position to sideways as it continues toward the cliff..