A thing I didn't understand in this episode is when George and his Cousin is in the van. George is waiting for his parents to show up. Then the guy who used to own the van comes up to the window screaming "Seinfelds van!", and George thinks that he says "Son of Sam!". Then George escapes the van screaming "I know it wasn't Berkowitz!". Now, what does George mean by "I know it wasn't Berkowitz!"?
/Stefan