The so-called "Magic Bullet Theory" is fallicaious and fails when the difference in height between the rear seat of the car and the much lower jump seat on which Connally was sittingas well as Coannally's relative inboard seating position are taken into consideration.
http://frankwarner.typepad.com/free_...llet-fact.html
What the "Magic Bullet Theory" describes:
The Actual seating positions of JFK and Connally:
In case linking goes down, you can find the images at the link posted above.