“When Dutch street artist Iepe Rubingh, along with an anonymous crew, decided to ditch the blank white canvas (or a public wall) and opt for “reality” canvas instead, they managed to turn a grey plaza in Berlin into a colorful work of art that turned everyone into accidental artists.
500 liters of environmentally friendly, water-based paint in bright solid shades were strategically spilled onto the city’s Rosenthaler Plaza by the guerrilla troop, from buckets secured to their railway bicycles.
The wheels of vehicles and cyclists then “effortlessly” spread the colors along the intersection, creating a vibrant landscape in downtown Berlin.” via TGIF! Painting Reality – A Colorful Video | FinerMinds.
http://www.youtube.com/watch?feature=player_embedded&v=tXCnWUzUw_E
Bright, shiny objects! 
What do you think?