It's been said that the easiest way to know if a person in a crowd is looking at you is to yawn. It is so contagious that they won't be able to help doing it too. I am a believer in that idea now especially since the search for the perfect yawning picture resulted in several of my own.
This is the second picture in this series and it came to me shortly after the first. There is a third in what is now an interesting triptych.