If you are completely exhausted, there's a good chance you could sleep for nine, 10, even 11 hours -- but two months?
15-year-old Stacey Comerford of England has Kleine-Levin Syndrome, also known as Sleeping Beauty Syndrome. It's a condition that causes her to sleep -- for a very, very long time. It's not uncommon for her to sleep for a day or two, but two months was even a lot for her. She didn't even wake up to take her final exams.
Her mother says, "When she’s in an episode, she might get up to go to the toilet or get a drink but she’s not awake. I call it sleep mode ... When she wakes, she thinks it’s the following day. She doesn’t have any memory of it." Wow! (HuffingtonPost.com)