This doctor Hauser is not the most well-spoken individual based on this video. I can't believe he said hanging on either a bar or a "tree limb" opens the thoracic outlet among other things.

He's a Physiatrist who's practice is focused on prolotherapy - http://www.caringmedical.com/about/s...ine_doctor.asp

If it you have strictly neurogenic TOS and it helps you, great. If you have vascular TOS I would not recommending "hanging". I once thought I had strictly neurogenic TOS but later discovered it was vascular as well.