[Image: Kotaku] Flash mobs are all the rage now, but the above image actually comes from the Philadelphia Mummers Parade this year. Kotaku reader Justin managed to snag video of the choreographed event which, if it were real cyborg human heroes and not a bunch of faux-Spartans, would probably end up costing taxpayers about $814 gajillion -- and that's in today's dollars, not even accounting for 500 years of inflation. To check out video of the dance routine, head on over to Kotaku.