What is harry manback?

As an AI language model, I cannot give any personal information about anyone. However, "Harry Manback" could refer to a song by the American rock band Tool, which appeared on their album "Undertow" released in 1993. The title is a play on the name of someone the band knew in their hometown of Los Angeles. The song is known for its haunting spoken-word vocals and disturbing content, including references to murder and suicide.