Ha! I thought it was just me! I've had it wake me up before, thinking I had a call or a text!
It's just the muscle twitching in your leg.
There is a phenomenon with cell phones, I've heard text go off when it didn't. Lots of people have felt it vibrate when it didn't. Wonder what the connection is between the spirit world and cell phones?
Yes it's very weird n no one knows y it happens