Scream Your Head Off! Zombie Head Bowling
This is a series of zombie/severed head bowling balls created by advertising agency Jung Von Matt in conjunction with spraypaint artist Oliver Paaß as part of a marketing campaign for 13th Street, a German sci-fi/horror cable channel. The bowling balls were planted in several German bowling alleys (some with vaseline in the holes, for maximum gross-out), to the amusement and revulsion of the players there.
Pretty clever marketing campaign, while it surely alienated some people I bet all the horror buffs loved it. Check out the video below, which has already gone viral.