First day with my watch and all seem to be working fine until I asked Siri to navigate me home the app and directions came up and then bam the watch went black and became non-responsive. The battery was at 60% when this occurred and no matter what I did I couldn't get the watch to respond. So on my home I was cursing Apple up and down I was one of those that got up at 3am and still didn't get my watch launch day but anyway I was pissed. I had visions of selling all my Apple products and going back to Android and Windows. So I get home and I put the watch on the charger and the Apple logo appears then my watch face appears with 58% battery. So why did the watch turn off and why or how do you turn it back on if that happens again?