One of the delicious things about retirement is, if you get sleepy in the afternoon (or morning or evening), you can stretch out on the couch and take a nap. My usual MO is 10-to-20 minutes, just enough to reset the meter, like a power nap. Follow up with a cup of coffee or tea, and I'm ready to go again.
Occasionally, though, I fall into a deep, deep coma-like sleep that lasts 90 minutes, about the length of a full sleep cycle. During this dead-to-the-world state, I may try to rouse myself, struggle to open my eyes, to no avail. Sometimes I dream I am trying to open my eyes and can't, even though I am doing something sight-worthy like driving a car.
The long naps would not be a problem except sometimes I can't risk being unable to wake up in a timely manner. Like today, I'm dying to doze off for a bit, but I'm making bread and don't want to ruin it or burn the house down. (I can see me dreaming I am trying to escape a burning house but can't see because my eyes won't open.) Or the days I pick up my granddaughter after pre-school. Can't fall down on the grandma job.
Usually, those long naps occur after a poor night's sleep. Sometimes they also cause a poor night's sleep, like last night. Not only could I not get to sleep, but once I was asleep, a storm woke me. Betsy is afraid of storms but also getting kind of deaf, so she didn't waken then. She waited until about an hour before I had to get up (contractors coming today) to make sure my sleep was shortened at both ends.
At least I don't have to go to work on top of a crappy night's sleep.