Near the end of the movie the two ferrari's fall out of the plane. In a later scene you'll see the ferarri's standing with there hoods in the ground. The engine's of the cars are in the back of the car, so they should by with the back down in the ground.
Firstly, the cars are not both Ferrari's, one is a diablo, the weight balance of the cars are 49/51 front to back. Not much of a difference! Secondly, the cars would have been going end over end all the way down.