David Nkrumah Liebe Unger Hart (born 19 April 1955; also credited as D.L. Hart) is an outsider musician, street performer, sign painter, artist, puppeteer and actor. He is best known for his appearances on Adult Swim's Tim and Eric Awesome Show, Great Job!, performing bizarre puppetry and singing in a variety of voice characterizations. He is also known in the Los Angeles area for his role as a puppeteer on The Junior Christian Science Bible Lesson Program, a local public-access television cable TV program, as well as for performing with his puppet "Doug the Dog" just outside the Hollywood Bowl and Los Angeles Music Center after shows, where is known to many concert goers simply as the "puppet man". He has also been known at times as David Lieber Mintz, David Hart, David Unger Hart, David King Liebe Hart and DL Hart.