"Look, plumber's crack." Also, said plumber had a socioeconomic disparity.
In this first installment, the protagonist is a bit of a douche towards his companion. On later installments, he's pretty lovable and a fan favorite. In the game, he is voiced by one person, but he's voiced by a different person on the other installments. These two persons have something in common: they lent their voices to the 2007 TMNT movie.