wai of the magnificent Thailand, we have three levels. The first level or senior people aged less than or the same as me or a friend by the hand and bowed his head till the thumb chin. The second level is for people who are more senior or older people, such as parents, teachers, elders by the hand and bow before the thumb to the tip nose. And the final level is to bow before the thumb meets the hand between the eyebrows. We use this to pay homage.