Light Painting

This is extremely nerdy stuff, The experimentation is done by Dentsu ad agency in collaboration with Berg. The method creating this cool stuff is simply using two iPads to paint with light. They created 3D models of words, played a film of the cross section of those three dimensional words and then captured the results on a camera set to a slow shutter speed. All these techniques I gathered so far head to same direction creating a stop motion animation.

To read more about the experimentation_
http://www.dentsulondon.com/blog/2010/09/14/light-painting/