This is a LGAT/Cult organization. Look at the backgrounds and credentials of the group leaders. Not one squint of anything truly clinical in group work. Their works are experiential, which is also a good sign that they are not truly qualified to lead such groups. Tantrum yoga? My skepticism is high and my red flags are up all over the place. I have seen this work before in other LGATS and cults. There is nothing new here, just new packaging on an old new age thought. I suspect that they are inducing false catharsis in people.
This is put on by Mankind Project. It is one of their many "trainings" they offer after their initial NWTA (New Warrior Training Adventure) weekend. I was involved heavily with the sister organization, Woman Within for 4 years and am very, very sorry I was. The men's side is more insidious. My ex was and still is heavily involved with MKP and did both of the trainings you ask about. He is a narcissist, sociopath, and abuser - and is quickly moving his way up through the ranks - that should speak volumes. After he did his weekend, he became even MORE violent and controlling, but now had a group of women-haters to back him up. If you have any more specific questions, i would be happy to answer them