MUTO a wall-painted animation by BLU

This is amazing, just amazing. Check out this brilliant stop motion animation painted on the streets on Buenos Aires by street artist BLU.

Reverse Graffiti

According to wikipedia the definition of reverse graffiti is:

Reverse graffiti also known as clean tagging, dust tagging or grime writing, is a method of removing dirt from a surface while creating graffiti on walls or other surfaces. It is usually done by removing dirt/dust with the fingertip(s) from windows or other dirty surfaces.