Quadcopter show

colorex

Rotor Riot!
Mentor
Cool stuff, but they still need some positioning accuracy. The RGB bulbs were better than the mirror system in the other video, though.

Imagine the pain in recharging!
 

UndCon

UndCon
pretty cool - all computer controlled so no big deal actually.

A few other interesting issues: ~50 flying vessels that can drop in someones head...talking about safety issues regarding RC this is far worse as it is performed in a public space - assuming by the images over a vast area.