Paul Nelson Humphrey (born October 12, 1935, Detroit, Michigan, United States) is an American jazz and funk/R+B drummer.He worked as a session drummer in the 1960s for jazz artists such as Wes Montgomery, Les McCann, Kai Winding, Jimmy Smith, Charles Mingus, Lee Konitz, Blue Mitchell and Gene Ammons.As a bandleader, he recorded under the name Paul Humphrey and the Cool Aid Chemists, with keyboardist Clarence MacDonald, guitarist David T. Walker, and bassist Bill Upchurch.