Just say you had these nanobots working in your body that meant you could live forever, by constantly rebuilding you etc. And just say you were cryogenically frozen and put deep underground for 1000years. If you were to get cryogenically frozen and wake up after 1000 years, what do you reckon the wait would feel like? You reckon it'd feel like the same as a night's sleep, like going to sleep and waking up soon but in facts it's been 1000 years or would it feel waaayyy longer? thoughtS?