"Julian Beever is an English artist who's famous for his art on the pavement of England, France, Germany, USA, Australia and Belgium. His images are drawn completely deformed which give a 3D image when viewing on the right angle ... see for yourself it's amazing!!!
The feet at the top; the guy in the top-right; and the coke & glass in the bottom-left are real but the rest is drawn on the floor...
The 1st image is viewed at the right angle.... and the 2nd one is viewed at the wrong angle.
Go HERE for more pics