Have you seen the movie Passengers? From IMDB “A spacecraft traveling to a distant colony planet and transporting thousands of people has a malfunction in its sleep chambers. As a result, two passengers are awakened 90 years early.”
how close is that to reality?
From Popular Science
Instead of one long hibernation, like in Passengers, crew would go through staggered two-week stasis periods, says Bradford. After two weeks of hibernation, a crew member would be resuscitated, recover for a few days, and then go back into hibernation for another cycle. "Our medical team is more concerned about the duration of any one cycle versus repeat cycles," says Bradford, "because there doesn't seem to be any lasting or long-term impacts on the recovery period."
To set this artificial hibernation in motion (or, rather, not in motion), SpaceWorks would lower a person's core temperature to 32 degrees Celsius, then sedate her to stop the body's natural defense against the cold—shivering. Hospitals use this practice, called "therapeutic hypothermia" or "targeted temperature management," when a patient with a traumatic injury, such as cardiac arrest, needs extra time to heal due to lack of blood flow. The lowered temperature sets the patient into an unconscious-like state and acts as a neuroprotectant, slowing down his metabolic rate and lowering his risk of ischemic injury (tissue damage from lack of oxygen and other nutrients due to low blood flow). Once he's recovered, doctors can warm him back up and address other injuries.