How you ever danced ecstatically? Like gone crazy while wearing headphones or something?
I have not, but I do know that it was first used in 2001
What is ecstatic dance more precisely? I assumed it was just flipping around like crazy.
Sort of.  It is considered transcendental and sacred dance that consists of movement meditation
Is it tied to a specific religion? Or is ecstatic dance just more of a generally spiritual thing?
I do not think it revolves around a particular religion.  It is open to all and is drug and alcohol free
I sort of sounds like yoga but hyped up instead of chilled out. Any connections to yoga practices?
Yoga
Yoga (; ; ) is a group of physical, mental, and spiritual practices or disciplines which originated in ancient India. Yoga is one of the six orthodox schools of Hindu philosophical traditions. There is a broad variety of yoga schools, practices, and goals in Hinduism, Buddhism, and Jainism. The term "yoga" in the Western world often denotes a modern form of Hatha yoga, yoga as exercise, consisting largely of the postures called asanas.
The origins of yoga have been speculated to date back
to crack sort of a pressure release. I don't know how crazy it is. People are trying to do that to themselves all the time, maybe not like that literally, but that's what people use drugs for and that's why people exercise--basically to release the pressure that's in them. I think it's something that everybody does in their own way; it's just that this is a particularly interesting way to relieve the pressures in your head."
Reception.
The staff of "