“Strangely enough, mud is not considered worthy of being studied at universities, so I brought the dirt to Harvard... precisely 60 tons of dirt right in front of the main {{w|façade}} of the Graduate School of Design. ...[I]t was particularly fascinating to see how many people were touching the wall... [W]e usually don't go around our cities caressing our façades, right? ...In terms of awareness-building and... education it was like {{w|an acupuncture}} trigger point.”