Best sleep of the night.?

Question

Why is it when you wake up early and you have less than an hour to sleep and your lucky enough to actually fall back asleep, it's the best sleep of the entire night. The alarm goes off and it's like "Damn, I was sleeping so good"

Answer 1

An example of a biphasic schedule would be sleeping from 8:30 pm to 10:00 pm (90 minute cycle), and then from 1:30am or 3:00am to 6:00am (best sleep time).

Most individuals complete a REM cycle in 70-90 minutes. By waking up at the end of a cycle you don't try to pull your brain out of a deep sleep thus a more restful experience sometimes including more vivid dreams.

***