Computer artwork with barrels rolling down by the endless staircase. A strange acrobat keeping balance on a barrel will play his trick infinitely, while barrels are rolling down.
This image was printed in T-shirts.
Artist's deviantART profile http://thepinkmonki.deviantart.com
The image was found at http://thepinkmonki.deviantart.com/art/Ascending-Barrels-Tshirt-102311308