nope, none that i can see. what's your method for making this? it looks like the drawing were done with a sharpie, do you scan them in and do a bunch of post?
yeah, used sharpie and filmed it on a piece of green bristol board (scanner is broken, but the camera works fine) don't know what post is, I animated it all in 'real-life' and some of it I did in photoshop.