 Pashchima Namaskarasana or Reverse Prayer Pose has the hands in prayer position behind the back.Urdhva Vrikshasana, also called Urdhva Hastasana or upward tree pose, has the hands stretched straight upwards, and the gaze is upward to the Angusthamadhye Drishti (thumbs).The pose occurs twice in Ashtanga Yoga's Surya Namaskar.