Original: While still attending the California Institute of the Arts, Hartman received the chance to intern as an in-between animator on the Don Bluth film, "An American Tail".
Simplified: Due to the success of "OddParents", Hartman was asked to create another cartoon for Nickelodeon, (Hartman says the President of Nickelodeon asked him if he had an idea, and before he could say the title he was given a contract.)