2. You recognize an old acquaintance sitting in a booth at a restaurant or in the lobby of the theater, but you make the initial, instinctive decision to look straight ahead and walk right by. For the rest of the meal/intermission, you keep your gaze locked on the face of the friend you're with as if you're taking an eye exam and the chart's on her forehead.
3. You've accompanied a friend to a party at which you don't really know anyone. Your friend starts talking to a co-worker or a college pal and you stand there and try to involve yourself in the conversation to limited success. Suddenly your friend says he has to go to the bathroom, leaving you with the co-worker/college pal. "Uh oh," you realize, "I've gotta turn it up from 20% to 85% now."
4. You're on the subway and it's late at night and there are only two people in your car: one is sleeping and the other is singing or repeatedly cracking his knuckles or not wearing pants.
5. You're sitting on an airplane and you're waiting for the flight attendant to come by to pick up your trash.