Went for my first run with the S2, no phone. The music was going in and out. I wear my watch on my left wrist and I think the Bluetooth receiver is on the right side of my Avantee Jogger headphones. Anyone else notice this? Probably the headphones, I wonder if how well they were charged makes a difference? Okay, but here's the strange thing. After I finished my run the watch sort of froze. The Apple logo was on the screen like it was starting up. Took a while before it came back to life. Battery was at 48%. Any ideas?