A British man has died mysteriously after opening a container which bears the red text "Pandora's Box." 37-year-old Jason Airey was found unconscious next to the box in his bedroom in Carlisle, Cumbria in May. He died two days later of natural causes.

According to the Carlisle News & Star, Mr Airey was in a happy mood when he returned when he returned to his family home after shopping on May 2. He was just supposed to change clothes in his room, but when he had been upstairs for some time, his parents got concerned.

"She went upstairs and came back down saying something was wrong. She couldn't wake him," Dennis Airey, Mr Airey's father, said of his wife Anne.

The senior Airey found his son slumped on his knees with his face down.

"I got hold of him and his shirt was clammy. His face was blue. I could feel a faint pulse on his neck," he told the paper, adding that he started CPR and called the paramedics.

The response team tried to revive the unconscious man for an hour before taking him to the hospital. But he never regained consciousness, and two days later, he died.

His father said he found "a little packet" inside the box. He thought it was cannabis, but it "didn't smell." It was later found out that it was synthetic cannabis.

"I thought [the box] had just been opened," he said. "It was a packet but had not been used. It was on the bed right beside him."

Mr Airey's toxicology tests had found no trace of drugs in his system, though, so it couldn't be the cause of his death. A post mortem concluded that he died of natural causes.

"His heart stopping caused the death of his brain which caused multiple organ failure, coroner Robert Chapman said. "We really don't know what caused his heart to stop."

The death is still considered a mystery, though Mr Chapman said that "there is a possibility that he had a fatal cardiac arrythymia - a change in his heartbeat."

Mr Airey's death is a mystery on its own, but what made it more mystifying is the "Pandora's Box" that was found next to him when he passed out.

In Greek mythology, Zeus gave Pandora a jar, which was mistranslated to "box," with the instruction that she should never open it. But curiosity won out, and Pandora opened it, unintentionally allowing all the evils contained therein to escape and afflict mankind.

In Mr Airey's case, it appeared that he had unleashed his own death upon opening the box.