[yt]http://www.youtube.com/watch?v=YBsJwapanWI[/yt]
WOW

I like the implications in this - basically you could let a swarm of drones loose anywhere for pretty much any purpose: carrying injured and/or unconscious people out of danger (burning buildings for instance), cleaning up hazardous materials - or you could have them place things where people can't reach in the same time: putting up cones and lights to re-direct traffic, dropping (medical?) supplies pretty much anywhere.