In this episode Ann Arbor artist and Top of the Park regular David Zinn, reflects on his work and his imaginary friends. Thanks to the temptations of a box of sidewalk chalk on an unusually sunny day, David is known all over the world for the art he creates under his feet. David’s temporary street drawings are composed entirely of chalk, charcoal and found objects, and are always improvised on location through a process known as “pareidolic anamorphosis” or “anamorphic pareidolia.” His most frequent characters are Sluggo and Philomena, but the diversity of David’s menagerie seems to be limited only by the size of the sidewalk and the spirit of the day.