How to I perform a head nod?
The head nod should be performed at a moderate speed, just like gesturing a very calm but deliberate ‘yes’ to communicate that you agree with another person. Start from a neutral head position, then dip the chin down to the chest, and come up again immediately. A movement that is too quick or too slow will not trigger the start. Bowing from the hips will not trigger the start. Avoid tipping the head backwards into extension.