The only thing more irresistible than pizza is free pizza. And that was exactly the trap that was set by prankster couple Prank Vs. Prank. Hungry passersby on South Street in Philly could not resist getting a slice of warm pizza, but instead got a hearty helping of prank with a side of fright. When they opened the pizza box a zombie jumped out to scare unknowing pedestrians who probably just lost their lunch.