There is a scene in the movie Airplane! (1980) in which a young boy suddenly recognizes the real-life actor who is playing the character of co-pilot Roger Murdoch. "Wait a minute!" he exclaims. "I know you! You're Kareem Abdul-Jabbar!"
The scene breaks the "fourth wall" to comic effect. Most viewers in 1980 would have recognized Abdul-Jabbar instantly, but the conventions of performance dictate that we try to pretend that he is just an ordinary schmoe in the cockpit. By "recognizing" Abdul-Jabbar, the boy calls attention to these conventions, and breaks the tension for viewers who were probably struggling to see the six-time MVP of the NBA as an airline employee.
Such an acknowledgment is missing from a more recent project involving Abdul-Jabbar, Miranda July's We Think Alone.