Internet prankster Greg Benson of Mediocre Films recently confused people at the mall by crashing their cell phone conversations (previously). Benson was able to pull of his prank by walking up next to a stranger who was talking away on their cell phone. Once he was close enough, Benson would then pull out his own phone and act like he was chatting with someone else about the same exact things.
He also released some extra footage and outtakes from the stunt:
submitted via Laughing Squid Tips