Laser Graffiti

Amazing stuff:

[ame="http://www.youtube.com/watch?v=DKbtTPYZEig"]Graffiti Research Lab L.A.S.E.R Tag - YouTube[/ame]

I'm still trying to work out if this is nything to do with a couple of guys that I know who have been out there, would be very cool if it was but I can't be sure.

 

I want to know how they are doing it with that little tiny pen.

 

That must be a pretty powerful projector. The projector traces where the laser goes and projects that image.

 

That's kinda what I was thinking.