Before the Spurs took on the Miami Heat in the NBA Finals, Tracy McGrady had a wild pre-game interview. When asked if he was ready to play in the game, he responded by saying, "Is a pig's pu*sy pork?" 

The head-scratching term is used when someone wants to express that something is obvious, or really self-evident, much like "Is the Pope Catholic?" Blazer's Edge journalist Ben Golliver tweeted about McGrady's comment, which you can read in the above slide: 

Source: buzzfeed.com