I woke up and thought right away I overslept and missed the waking up time, for I felt particularly alert and good. To my surprise though, I was only 2/3 of my allotted four hours and a half! Maybe I should have woken up, but I decided to go back to sleep and when the alarm woke me up in due time, then I didn't feel so good. I was dreaming, didn't want to get up and now feel tired and deprived of sleep.