For nine days, two men were imprisoned in a mine in South Korea. According to the men, they lived off of instant coffee, the BBC claimed. Yoon Suk-yeol, the president of South Korea, described their rescue as “really amazing.” For daily delivery of the newest tech news and scoops to your inbox, subscribe to our newsletter. Thank you for registering! They claimed they survived on meals of instant coffee powder during their nine-day ordeal in a zinc mine in South Korea.

The two men, aged 62 and 56, claimed to have survived by ingesting instant coffee powder and drinking cave water that had fallen from the roof, according to the fire department.

According to The Guardian, they “had instant coffee mix powder with them and I was told they had that as a meal.” Lim Yoon-sook, a fire department official. I’ve also been heard that they survived by ingesting any water that fell into the shaft.

According to The Guardian , the two guys were in a zinc mine around 620 feet deep when it suddenly caved in on Bonghwa late on October 26.

When they were rescued on November 4, according to BBC , both men were able to exit the cave on foot. They were then transferred to a nearby hospital, where medical professionals predicted that they would fully recover. According to BBC, rescuers bore a hole in the mine and inserted cameras to try to find the men within. This information was provided by South Korea’s Yonhap news agency.

The November 4 rescue, according to South Korean President Yoon Suk-yeol, was “really amazing.”
He posted on Facebook on Saturday, saying, “Thank you and thank you again for coming back safely from the crossroads of life and death.”

Park Geun-hyeong, the son of one of the men who was trapped in the cave, reportedly informed his father, “you’ve become a renowned figure now,” according to the Guardian.