I have had my 360 for about 3 months now and I love it. I wear it almost all the time. Lately it has seemed to vibrate randomly not related to any notification. Or so I thought. I ended up turning it off this afternoon since it kept doing it, and I made a strange discovery. It is not the watch vibrating, it is the muscles in my wrist under where my watch sits(left hand). Even with the watch on the right wrist now, I am still intermittently getting these weird muscle twitches right in the area the watch normally sits. This seems really crazy, but it is happening. Has anyone else had this happen???