It’s a landmark scene from the film, as she rattles off all sorts of car knowledge, with the coup de grace coming from the fact there were only two other cars besides the Buick Skylark in question that could have made the tracks submitted for evidence.
Well, as it turns out, there were actually three other cars… and the film’s writer has known about the film flub for quite some time.
Toward the end of My Cousin Vinny, Academy Award winner Marisa Tomei’s Mona Lisa Vito is called up to the stand by her fiancee, in order to debunk the theory that the getaway car used in a robbery belongs to his cousin.