For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
I've seen Dr. Bercelli's use of this technique in several online new age conferences. That doesn't make this dangerous, but it may lead to other new age techniques.
As I viewed a video of the exercises, it seems similar to what I naturally start to do when PTSD stress symptoms are overwhelming for me. However, I would not intentionally shake my body like that for an extended period of time. I find it to be more like a pacifying effect at the moment. I would be concerned about its connection to the documented denomic spirit known as 'kundalini'. It looks very much like that.
Thanks Todd, much appreciated. I'll investigate further