I think my mom has "Grey's"-dar

No joke, she can be dead to the world, and with 10 minutes give or take, she's back up at 9. I don't know what it is, maybe she's not really asleep and she's conscious of around what time it is each time she opens her eyes, but it's uncanny. I wish I had such an internal clock. Maybe I'd get my ass up in time to exercise in the morning.