I do not like the idea of yoga because of its links and ties to Hinduism.
Hinduism is not something I want to dabble in. This is owing to my knowledge of it and what I have been exposed to regarding it.
Personally, I was trying to push what I've just said out of my mind for years but I can never make it to a yoga class. No matter what I do and how I try something crops up that prevents me from attending. That "something", I believe, is God preventing me from opening up my spirit to it.
Regarding what you said, that eerie feeling is more than likely the Holy Spirit talking to you regarding this class.
Now, everyone has different views regarding yoga and there are many Christians that practice yoga and churches that offer it. So the general bottom line, I do not know.