Quote Originally Posted by Ninjaa View Post
Yeah that situation I've been in a few times and it felt cool and I didn't think much of it. Its just how violently my head was vibrating that it felt different to anything I've experienced before.
What you describing is not SP. But vibrations is a good sign. And you can get all kinds of different sensations, some more weird then the others. They are all perfectly normal. Good luck and Happy dreams