A 67-year-old man from Chengdu, Sichuan province, China, named Ding, began suffering from abdominal bloating and pain a month ago. He initially ignored the symptoms as signs of gastroenteritis, but when medications and dietary changes failed to provide relief and his condition worsened to the point where he couldn't lie down due to excruciating pain, he decided to go to the hospital. During an examination, doctors discovered a strange, smooth, black, cube-shaped foreign body in his stomach. When asked if he had any idea what it was, Ding recalled an incident from about 40 years prior. During a gathering with friends, he had swallowed a lighter as a dare. The medical team confirmed that this was indeed the foreign object. They decided to postpone its removal to verify its nature and origin. The doctors were shocked to discover that the lighter was still functional, even though its casing had been eroded and turned black by stomach acid. They explained that common lighter casings are made from acid-resistant materials like polypropylene or ABS plastic, allowing them to withstand corrosive stomach acid for a long time. Because the object was too smooth and slippery, a standard endoscopic procedure was not feasible. Ultimately, the team chose a technique similar to using a balloon, completely encapsulating the foreign body before pulling it out.