This is how Rivière describes himself:
Inspired by the hacker culture, he reinvests and diverts public space to allow citizens to reclaim their environment. His interventions, located between urban design "Do It Yourself" and upcycling (upgrading waste), have the particularity to be spontaneous and raw, exclusively made with objects found in the street, and always with humor.
A lot of his projects are really funny. Here, he's offering a carpet painted to look like a pedestrian street crossing for €10.