Why Do I Always Dream of Death When I Nap?

I though naps were too short for dreams. So why when I close my eyes for a so-called power nap, do I see myself floating in space, thinking about how one day I'll be dead. Maybe not today, maybe not tomorrow, but one day I will die. I'll be gone. If I die tomorrow, I think during this supposedly restful sleep, my son probably won't remember me. And who is going to remember me in fifty years, in one hundred years. Anyone?

Ahh, time to wake up.

Mmm, what a delightful nap.

Time to do the dishes.