Via Jay Nordlinger:
…Several years ago, in between periods of a hockey game, a black player [Anson Carter] was being interviewed. The host referred to him as “African-American,” and the player corrected him, saying, “I’m Canadian.” Less than a minute later, the host repeated the error, and again the player corrected him. This happened at least twice more. The look on the face of the poor interviewer was one of abject horror: He knew that he was in a PC minefield.