Thanks to MediaCreativity:

The idea and execution are simple, cost-effective and cause-effective. Is it daytime in a tropical climate? Then wear sunblock.
Nivea Sun advertised its product using mirrored billboards that projected copy onto walls, storefronts, car doors, sidewalks and buses, using the sun’s rays as its ink.

[from Mediacreativity]
Picture it: You’re walking through Manhattan and you pass a discarded modern, colorful chair, in good condition. Do you take it home with you?
Anything curbside is fair game to passersby, but what about a chair left inside a park? These questions were answered in November when Blu Dot and its agency Mono concocted a two-day experiment that led up to Blu Dot’s one-year anniversary in its SoHo location.
Over the course of two days, Mono placed 25 brand new “Real Good Chairs” throughout Manhattan, and watched and waited for these chairs to find new homes.
Each chair was GPS-equipped, allowing mono to track the chair’s location and pay a visit to the chairs’ new owners. Can you imagine taking a chair off the sidewalk and having someone ring your doorbell to inquire about the chair?

http://www.youtube.com/contest/topthistvchallenge

One side of the Atlas building in downtown Columbus, Ohio was the recipient of a sloppy paint job in a not-so-mellow yellow hue. The messy paint experiment is part of a well-executed three-ad wallscape for Nationwide Insurance that’s thinly disguised as a paint brand campaign.

Un lato dell’Atlas Building edificio nel centro di Columbus (Ohio – USA) è stato il destinatario di uno scrupoloso lavoro di pittura con un giallo di tonalità non molto morbida. L’esperimento fa parte di un annuncio in tre parti della Nationwide Insurance, che non si distingue molto da una marca di vernici.