Learn how to nod yes like a south Indian.
Step 1: Step 1
Bring your head into a neutral position. Balanced evenly on your shoulders.
Step 2: Step 2
Tilt the top of your head out right while pushing our chin out towards your left.
Step 3: Step 3
Bring your head back to the neutral position.
Step 4: Step 4
Tilt the top of your head out left while pushing our chin out towards your right.
This is exactly opposite to step 2.
Bring your head back to your neutral position.
P.s. Repeat the steps as man times as you want, the more times you repeat it the surer you look, smile if you want to look polite :D