Pins and needles- Well, it is possible vibrations could be like that, but it may just be pins and needles too. It might depend on where you felt this. There is a sensation I remember that is very slight- almost like how a cold chill will spread along. If this is felt in my head, it is usually the precursor to a more definite vibration sensation. One thing I remember too is that when this happens, I usually know it- there is not a feeling of "is that a vibration?" or not. That sense of knowing it is happening is very definite to me anyway. It is an expectant feel, like a pressure you know is building, and will be let out.