I have to say I like this effect.
That said, you can't see the colours until it comes down into the crowd. Just looks pure blue. Would have thought the producer would have used the Pango to modulate the power to high levels overhead.
http://uk.youtube.com/watch?v=NuIcc2...eature=related
Also, I don't know the limits of Pango but can't you apply a cut off horizon (a masked zone) in which case I would have thought that even within the fan the powers would have been modulated so that whilst the bit in the crowd was at low power the bit of the fan rotated out was at high.