Sufi Dancing (whirling dirvishes)

These guys were insane. Or in ecstasy. One of the guys spun for about 40 minutes. I felt like I was in almost as much of a trance as he was. I was sincerely worried for his health. How would he come out of the spinning? Would he fall over and die? Would he have to lay on the ground and retch? Eventually he just stopped. He stood perfectly still. Incredible.