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David Allen, known professionally as Dave (Gruber) Allen is an American television and film actor and comedian, best known for his work on the 1990 TV series The Higgins Boys and Gruber and playing guidance counselor Jeff Rosso on the Judd Apatow-produced comedy-drama Freaks and Geeks. He also played Mr. Kwest on Ned's Declassified School Survival Guide and a town troubadour on Gilmore Girls. Allen had a minor role as an "Electrocuted Ghost" known as "Sparky" in the 2016 film Ghostbusters. Wikipedia