A prisoner in northern Spain survived his "death" and lived to tell the tale when he woke up in a hospital mortuary after being officially certified as deceased. He was scheduled for an autopsy, and remains under hospital observation in Oviedo, Spain, according to the BBC.

Gonzalo Montoya Jiménez, 29, was discovered unconscious in his cell on Sunday, January 7, Spanish news outlets report. It's now thought that he might have suffered from catalepsy, a condition in which people become immobile and cease responding to external stimuli. With waxy, flexible limbs and slowed vital signs, patients with catalepsy can appear dead—which might be why not one but three physicians concluded that Jiménez had crossed over to the other side. 

Jiménez was moved to the Institute of Legal Medicine in Oviedo after doctors ordered an autopsy on the inmate's body, IFL Science reports. Family members—who had been informed that Jiménez was dead—said the prisoner’s body was already marked up for dissecting when he began showing signs of life. A forensic team noticed and moved Jiménez to an intensive care unit, where the patient ultimately regained both his memory and speech.

Catalepsy is associated with epilepsy, schizophrenia, nervous system drug toxicity, and other conditions, according to the National Center for Biotechnology Information. Jiménez reportedly has epilepsy, and it's unclear whether prison doctors knew that when they first declared him dead. 

[h/t BBC News]