These creepy bowling balls are part of an advertising campaign for 13th Street (a murder mystery television channel). The art direction was done by RUOK and spray painting art by Oliver Paass.

Additional credits:
Advertising Agency: Jung von Matt/Elbe
Chief Creative Officer: Sascha Hanke
Creative Directors: Tobias Grimm, Jens Pfau
Art Directors: Damjan Pita, Nicolas Schmidt-Fitzner
Graphic Designer: Christoph Mäder
Copywriters: Henning Robert, Jan-Hendrik Scholz

Editor: Sebastian Pietta
Artist: Oliver Paass

Notes about project (published at RUOK’s website):

For more than three weeks he [Oliver Paass] made detailed 360° layouts that were sprayed on standard bowling balls. In several German bowling alleys we swapped the standard balls for these special ones. Additional black balls referred to the German horror TV channel No.1:

Link via Toxel