while i was in college, we had a guest lecturer come in who walked around certain cities and old styrofoam pieces from things like tv boxes and such off of an old chinese cart. He had a documentary made about him too. This also reminds me of another artist Ive seen who makes blow up monster and fixes them to subway air grates. Whenever a train would pass under them it blow them up making a giant air monster. found a link http://youtu.be/PH6xCT2aTSo
Wow, those hot-air monsters are cool! The trash piles converted into monsters are a bit bizarre, though.
