Setu Bandha Sarvangasana-- Setu meaning, "Bridge", and Bandha meaning, "Lock."   Or the "Bridge Pose" as commonly referred to in English.  To achieve this posture, you will begin by lying flat on your back with your arms directly at your sides and palms facing down.  Then, contracting your quadriceps, you should bring up your knees until they are almost perpendicular to the ground.  Your feet should be at hip width apart, and being slightly turned out.  Then, draw down your tailbone to level out your pelvis until the space between your neck and knees are almost straight, with a slight outward bend if possible.  Then press your hips up (while remembering to keep your tailbone down), and slide your shoulder blades in toward one another.  Slightly lift your chin up, and bring your chest out.  Engage mula bandha, and firmly squeeze your knees in toward one another.  To exit this pose, slowly reach the vertebrae closest to your neck down to the ground, continuing down your spine in a rolling fashion.

Therapeutic and Physical Benefits:
Setu Bandha Sarvangasana calms the  It also calms the brain, rejuvenates tired legs, improves digestion, relieve stress, and stimulates the abs, lungs, thyroid.

In this asana, I feel a sense of openness.  I also feel cleanliness.  I can breathe better, I feel a lengthening feeling in my back, and I feel a nice stretch in my quadriceps.  I feel very calm when I am in this asana, I feel like I could hold it forever and remain calm, and have a sense of purity.  When I practice this asana for a long period of time, I start to sense that this is what meditation is really like.


References:
Bridge Pose - http://naturalyogabodywork.com/bridge_pose.pdf - instructions on attaining the asana
Yoga Journal:  Bridge Pose - http://www.yogajournal.com/poses/472 - meaning of the asana