Watched some videos posted by Aneros users. Not all of them use the term "super-O", but most of these videos show them shaking in different paces. My question is: Is the body shaking involuntary, is it controlled or is it "encouraged" by amplifying the urge to move around? To those who have experienced the shaking, can you detail what happens or how it feels before the shaking? Did you "want to" or "have to" shake?