system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: Is there any explanation why when we sleep it seems like time is so fast? For example, ive been asleep for 9 hours but it feels like just a minute.
gpt
Time passes inconsistently based on how aware of it you are. Five minutes doing something unpleasant feels a lot longer than five minutes doing something you love, because you are keenly aware of the time passing when you're waiting for it to reach a certain point. 


When you're asleep you aren't counting the time, and therefore it doesn't have the slow down effect.