I'm pretty good at sleeping. Once I have fallen asleep, if I wake up, but decide I don't want to get up yet, I simply roll over and continue sleeping (or I go back to bed after going to the bathroom and just continue sleeping without a problem). So the answer is, yes, at times I do wake up at odd hours in the night (and other times I sleep until odd hours in the day - one time I went to bed around 5am and didn't wake up until after 10pm, not waking even once in that 17 hour period, it was absolutely riddiculous) - but if I am not ready to get up yet, I have no problem getting back to sleep.