I got this pose out of a dzogchen book. It generates a lot of heat and I believe is good for purification of the body. I found the following on-line:
The Vajra Standing Position is undertaken by placing the palms above the head, slightly apart in pyramid fashion. Trunk must be straight. Heels should be touching only with the toes on the ground. Knees are open wide. The upper triangular spokes symbolize three ideas: (i) entity is empty, (ii) nature is brightness, and (iii) great compassion pervades everywhere. The lower triangular spokes symbolize the three Kayas: Dharmakaya, Sambhogakaya, and Nirmanakaya. The middle body symbolizes the connection of the upper body (torga) with the lower body (che-cho).
Has anyone done this pose? Just holding it for a couple of minutes is fairly challenging.