A young, attractive, professional woman boards the bus along with a suspiciously large number of people. Something isn't quite right, and she's a little off put on the unusually crowded ride, sandwiched between strangers. But things take on a lighter mood when one of the passengers pulls out a boom box and starts blasting the YMCA, as all of the passengers join in. It's a flash mob; just some harmless fun! The jovial crowd gets off at the next stop, only leaving the bus driver to find that the young woman is left on the floor of the bus, dead.