All of a sudden while i was on a call, my phone shut off and it started rebooting. The reboot stage in which it displays the droid sign hangs for a little bit then it shuts off. After it shuts off, i try pressing the power button on top to reboot it and nothing happens. I did a complete batt pull and it still keeps turning my phone completely off at the droid display message. What happened? I didnt even drop it and it was working perfectly fine. I'm not rooted or done anything to my phone. wtf????????