When I move a certain way or tap my lower back, I feel vibrations that go from my sides, down my legs, and end at my feet! It's not constant, but it sure is annoying!! Has anyone else experienced this before??? Or am I the only "lucky" one? Oh yeah one more thing..I'm a runner and the sensation stops completely while I'm running but once I finish, the damn vibrations start up again!!! Any info/ advice is greatly appreciated!! thanks in advance:)