Something similar happens to me. When I'm really exhausted from the day, I fall asleep while reading or relaxing (maybe from 9pm to 2am) and then wake up again.

Something similar happens to me. When I'm really exhausted from the day, I fall asleep while reading or relaxing (maybe from 9pm to 2am) and then wake up again. I'm then awake and do a few things for an hour or two. I like how it messes with people when you send them emails at 4am. Then I'm getting sleepy again and sleep the rest of the night normally.