How Long To Nap
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My grandmother used the keys-in-hand method. Sleeping on a couch with one arm with keys outwards. Once the hand let the keys fall she woke up. That was apparently perfect for her sleep cycle.
Interesting. I suspect keys would not be enough to wake me up...maybe a bowling ball...
I'd need the bowling ball to start a Rube Goldberg machine that flips me off the couch.
Now try to see if you can hold a bowling ball for the duration of trying to fall asleep
Woosh!
well, seems there's a market for a small hand-held thingy that sets off an alarm when it hits the ground!