'Voorhees law' explains why the slower car often catches up

Many drivers will know the feeling: you pull ahead of the slower car you've been stuck behind and cruise the open road ahead at your own, faster speed. By the time you reach the next stop light, you're sure that you've left the slower car far behind you—but to your surprise, you see that same car cruise up right behind you in the mirror. Horror buffs might even recall scenes from "Friday the 13th," where masked villain Jason Voorhees always catches up to his sprinting victims—despite himself walking at a leisurely pace.