In November 2009, 26-year-old John Edward Jones suffered one of the most agonising deaths imaginable; a tragedy that has haunted cave explorers for almost 16 years.

Jones, a medical student and father-of-one, loved spending his free time exploring tight cave systems. But a trip to Utah’s Nutty Putty Cave with his brother Josh and a group of friends ended in disaster when he took a wrong turn into an unmapped, claustrophobic passageway just 10 inches high and 18 inches wide.

The space was so tight that Jones became wedged headfirst, unable to turn around or free himself. His brother scrambled back to the surface to raise the alarm, triggering a massive rescue operation that would last more than 27 hours.

Dozens of rescuers worked in shifts to free him, battling the cramped conditions and the awkward position of his body. But as time went on, Jones’ situation became more critical. Being trapped upside-down for hours meant blood rushed to his head and his heart was under extreme strain.

Brandon Kowallis, a fellow caver and YouTuber who took part in the rescue, was the last person to see Jones alive. Writing about the ordeal, Kowallis said John drifted in and out of consciousness and had trouble breathing. Rescuers brought down a radio so he could speak to his family, Metro reported.

“I think it was his father, mother, and wife who spoke to him,” Kowallis recalled. “They told him they loved him and were praying for him. His father gave him a blessing. His wife mentioned a feeling of peace, that everything would be OK.”

Not long after that conversation, Kowallis and another rescuer, Debbie, crawled down to check on John. What they saw was devastating. Alongside his laboured, gurgling breaths, his legs twitched violently; a sign that his condition was worsening rapidly.

Kowallis said the scene looked “very bleak,” with little hope of a successful rescue. Attempts to shift him into a horizontal position failed. “It looked like he could only be lifted another foot or two in his current position,” he explained, per LadBible. “His feet would hit the ceiling, with no room to manoeuvre.”

Eventually, Jones went unresponsive, succumbing to cardiac arrest and suffocation in the narrow shaft.

Authorities deemed it too dangerous to retrieve his body. Instead, they sealed the passage with explosives, making Nutty Putty Cave a permanent tomb.

Today, a memorial plaque stands at the cave’s entrance – a sombre reminder of a tragic day that left the caving community forever changed.