Many people have reported near-death experiences, but in some cases, survivors appeared to bring back something far more unsettling than memories.
Some survivors claimed they saw and heard things that should have been impossible while they were clinically dead, including conversations in operating rooms and objects located far outside their hospital beds.
Several of the most famous cases involved patients whose brains allegedly showed little or no measurable activity at the time of their experiences.
One woman accurately described a worn tennis shoe sitting on a distant hospital ledge while doctors fought to revive her after a heart attack.
Another patient stunned surgeons after describing bizarre hand movements made during open-heart surgery, despite being under anesthesia with his eyes taped shut.
Perhaps the most controversial case involved a woman whose body temperature was lowered to 50 degrees Fahrenheit during a rare procedure that left medical monitors reportedly showing no detectable brain activity.
Researchers have spent decades attempting to explain the phenomenon, with some arguing the visions are caused by hallucinations, trauma or fragments of consciousness lingering during medical emergencies.
But several near-death experiences continue to baffle experts because of the precise details patients later recalled, details they seemingly should never have been able to witness.
Many people have reported near-death experiences, but in some cases, survivors appeared to bring back something far more unsettling than memories
Scientists have increasingly studied the phenomenon, with one study estimating that up to 17 percent of people who come close to death experience some form of near-death event.
Research has also suggested that heightened awareness during these episodes may be surprisingly common.
A 2014 study found that 74.4 percent of respondents said they felt more aware during their near-death experience than in ordinary consciousness.
Research conducted with the Near Death Experience Research Foundation (NDERF) found that many episodes occurred after cardiac arrest, when previous studies suggest little or no brain activity should be present.
While skeptics argue these events can be explained by hallucinations, memory distortion or lingering awareness during trauma, several cases continue to baffle both scientists and medical professionals.
The shoe on the ledge
In a 1977 case, a woman was admitted to Harborview Medical Center in Seattle after suffering a heart attack.
The patient, Maria, was treated by hospital worker Kimberly Clark Sharp.
During a rare 1991 brain surgery in which her body temperature was lowered to 50 degrees Fahrenheit and medical monitors reportedly showed no detectable brain activity, Pam Reynolds later recalled specific conversations and surgical details she allegedly should not have been able to perceive
Join the discussion
Would YOU want to know what happens in a near-death experience?
Sharp later wrote that Maria ‘observed a number of scenes during her resuscitation,’ including what she described as an out-of-body experience.
At the time, Maria was flatlining on the operating table, according to Sharp’s account published in the Journal of Near-Death Studies.
Maria claimed that while doctors attempted to revive her, she left her body and floated outside the hospital building.
She told Sharp there was a dark blue, left-footed tennis shoe sitting on a ledge on the other side of the hospital.
Maria described the shoe in detail, including that the toe area was worn.
When Sharp checked the location, she found the shoe exactly where Maria said it would be.
Sharp later said: ‘The only way she could have had such a perspective was if she had been floating right outside.’
Skeptics later recreated the scene and suggested the shoe may actually have been visible from the ground.
Still, the case remains one of the most widely discussed near-death experiences ever reported.
The ‘flapping’ surgeon
Another famous case involved a patient who recalled a bizarre detail he seemingly could not have seen.
Truck driver Al Sullivan underwent bypass surgery in 1988 when he experienced what he described as leaving his body during the operation.
Sullivan was under anesthesia and had his eyes taped shut.
Yet he later described an odd detail that stunned his doctors: his surgeon appeared to be flapping his arms like a chicken.
Sullivan wrote: ‘I began my journey in an upward direction … To my amazement, at the lower left-hand side was, of all things, me.’
‘I was lying on a table covered with light blue sheets, and I was cut open so as to expose my chest cavity. It was in this cavity that I was able to see my heart on what appeared to be a small glass table.’
‘I was able to see my surgeon, who just moments ago had explained to me what he was going to do during my operation. He appeared to be somewhat perplexed. I thought he was flapping his arms as if trying to fly.’
When Sullivan later described the surgeon’s movements, cardiologist Dr Hiroyoshi Takata was reportedly shocked.
Takata explained that during surgery, he often tucked his hands beneath his armpits to keep them sterile while pointing with his elbows.
Medical staff said the unusual detail appeared to support Sullivan’s claim that he had somehow observed the operation during an out-of-body experience.
Skeptics argue Sullivan may have noticed the movements before anesthesia fully took effect, but the story remains among the most controversial near-death cases ever recorded.
The ‘standstill’ case
In 1991, Atlanta woman Pam Reynolds began suffering symptoms including dizziness and loss of speech.
Doctors at the Barrow Neurological Institute in Phoenix, Arizona, determined she needed a rare and dangerous procedure to remove a brain aneurysm.
During the operation, Reynolds experienced what became one of the most famous near-death experiences in medical history.
Her case drew worldwide attention because the experience allegedly occurred while she had no measurable brain activity.
Doctors performed what is known as a ‘standstill’ operation, lowering her body temperature to 50 degrees Fahrenheit while stopping her heartbeat and draining blood from her head.
Medical monitors reportedly showed a flatlined EEG with no detectable brain activity.
Despite this, Reynolds later recalled details from the operating room, including conversations between surgeons.
She also accurately described the surgical saw used during the procedure and other details that advocates say she should not have been able to know.
Medical equipment, including headphones emitting clicking sounds to monitor brain activity, suggested she should not have been capable of hearing the conversations.
Reynolds’ story later became the subject of the documentary The Day I Died and continues to be cited in debates over consciousness and the possibility of an afterlife.
Skeptics maintain the conversations Reynolds described may have occurred before brain activity fully ceased, while she was still partially aware under anesthesia.
