Double Sleep

This experience was just too bizarre...

In a dream last night, I took a nap. I dreamt that I was traveling, and while on the bus I fell asleep. Not only did I fall asleep, but I overslept by two hours and missed my stop. It's enough of a challenge being tired when awake, but being tired while already sleeping is even worse!

So here I am sleeping, and in my sleep, I go to sleep. And, I got to wake up twice in the same sleep stage. First, I woke up from the nap in the dream, then, I woke up from the dream itself.

Could this double sleep be a way to to cut my sleep hours in half? Or, could it be a way to sleep the same amount and feel like I slept twice as much? Or like most dreams, mean nothing at all.