A Swedish man undergoing surgery for a collapsed lung woke up halfway through the operation.
"It was terrible, my worst nightmare,” the 22-year-old patient, from Vaxjo in southern Sweden, told The Local.
The man wrote in a complaint to the National Board of Health and Welfare that about 15 minutes after going under the knife he regained consciousness and was able to listen to the doctors and nurses speaking.
For about 35 minutes of the 50-minute procedure he felt intense pain but could not communicate with the medical staff around him.
"My brain kept telling me over and over 'say your name, say something, do something, wiggle your toes' but I was completely incapable of saying something or moving my body at all," the patient wrote.
The man said medical staff expressed shock about the incident but he had still not received an explanation and continued to suffer from the harrowing experience.
"It is still difficult on and off. It was the worst thing I could imagine. I still find it hard to sleep sometimes," he told The Local.