David Nkrumah Liebe Unger Hart, also credited as D. L. Hart, (born April 19, 1957) is an American outsider musician, 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 Teaching Bible Lesson Program, a local public-access television cable TV program, as well as for performing with his puppet "Doug the Dog" just o…