Welcome to your Interesting Sleep Facts Quiz The longest time a person is known to have gone without sleep for, is: 3 days 11 days 3 months 11 months None According to NASA, how long is the ‘perfect’ nap? 5 minutes 12 minutes 15 minutes 26 minutes 47 minutes 60 minutes 72 minutes None What is the name of the sensation of jolting suddenly awake when drifting off to sleep, often accompanied with a feeling of falling? Hypnic Jerk Sleep Start Myoclonic Jerk Sleep Twitch Night Start All of the above Is it possible to dream in black and white? Yes No None Time's up