Strange problem rebooted the ATV

I had a strange issue tonight where I was watching a recording in Channels ATV and the audio cut out but the video kept going. I pressed back/fwd, menu, pause etc but nothing happened. Then after playing for about 10-15 seconds without audio the screen went black and the ATV restarted! Strange.
I went back into channels and submitted diagnostics logs under video playback. Not sure if the logs will have anything useful.