D'Marco Dunn chooses his words very precisely.
He is answering a question about a play that happened this summer during pickup games, and he wants to make it clear that he's not boasting. Players understand that during the course of a summer, pretty much everyone is on both the giving and receiving end of big moments. Everyone has been dunked on. Everyone has been crossed over. Everyone makes a game-winner.
So he wants you to understand that context. "I don't want to gas him," he says, and the "him" in question is Tyler Hansbrough, Carolina's all-time leading scorer.