I don't know if you have ever watched the NBC show Outsourced, I love it.
I have almost choked on what I was eating from laughing so hard while watching it. Why?
The show is about an American who has to work in India and him learning about the culture and nuances. The similarities between the show and what we deal with living in Sri Lanka are very close.
In one episode the "head bobble" is explained to him. "Sometimes it means yes, sometimes it means no, sometimes it means maybe". Scary thing is after you've been here awhile you can actually tell what head bobble is which. Case in point, I was at this event and this girl asked a gentleman to take our picture. He pointed the camera and bobbled his head, I knew that meant, "Nope, didn't get the picture", she showed him how to use the camera and he tried again and bobbled, my guess this was a "Maybe", it was, one more try and another head bobble, he took a good picture. Scary thing is, I have caught myself head bobbling a time or two.
Other aspects of the show deal with the food, cleanliness, tuk tuks, food poisoning, things we deal with pretty on a daily basis.
Believe me, the show is much funnier if you have ever lived in India or Sri Lanka.