Vibrating bracelets is an excellent idea, but I wonder if they would work for a really deep sleeper.
Back when I had a pager and was on call, I'd set it on top of a shallow pile of coins. The racket it would make and the sound of coins falling onto the (hardwood) floor was enough to wake the dead.
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[ 530 ms ] story [ 1406 ms ] threadBack when I had a pager and was on call, I'd set it on top of a shallow pile of coins. The racket it would make and the sound of coins falling onto the (hardwood) floor was enough to wake the dead.