 FAKE: When Marty is being chased by terrorists, it appears as though  a stunt double is driving the car. Actually, this is footage that  was shot with the actor Eric Stoltz (qv) playing Marty.  Michael J. Fox (I) (qv) was later chosen over him, but they kept  the driving scenes at the mall with Stoltz in, since the shots were  fairly distant and the drivers face is not particularly visible.