This got me curious as to what had happened so I loaded the data into OSCAR and this is what I see.
[attachment=19905]
Around 23:10 I had a RERA after about 30 minutes of near constant flow flow limitation (one recovery breath about half way). It looks like I must have removed the mask shortly after the arousal as there was a large leak then I must have blocked the mask holes with my thumb and fallen back to sleep, I do not remember any of this happening. The machine deadheaded for a while then it either shuts off or at least the session ends and data is not recorded (I have smartstart off, not sure why it was shutting off, I assume some sort of protection built into the machine? Overheating due to deadheading?). Over the next half hour there was a few times when it turned back on due to a short bit of flow then grasp must have tightened and it would shut off again. Then 35 minutes after removing the mask I must have woke up and realized I was holding the mask, released my grip and air started flowing again so put it back on and went back to sleep.
All a very strange event and it made me think a thread like this where people could share some of their strange nights on CPAP would be interesting.
If anyone knows what was causing the machine to turn off that would be interesting to know as well.