If you are angry you can do this Mudra. It activates and balances Apana Vaayu. When you have a back pain or any pain for that matter, do this Mudra.  Unwanted Apana Vaayu will be released in 15 minutes.

This Mudra activates air and air means movement. Whenever you are in a traffic jam, it will create movement in you and thus movement outside you.

It reduces infatuation.

It also helps us to avoid misconduct between male and female.

Refer this blog to know more details about Chin Mudra:http://healbymudra.wordpress.com/2009/12/25/chin-mudra/