Rethink Vancouver created this little "performance art" stunt for Stihl professional chainsaws:
First they put a coupon and an actual chainsaw on a billboard.

After a few of weeks a guy showed up one morning, cut out the giant coupon with the chainsaw, and left with it. The board then stayed up with a big hole in it.

Agency:Rethink Communications, Vancouver Ian Grais (Creative Director) Chris Staples (Creative Director) Katie Ainsworth (Copywriter) David de Haas (Art Director)