This experiment almost ended in tragedy. I found the perfect two-room cave with a river view and decided to turn it into a cozy home. But everything went wrong when I installed a stove in the enclosed inner room. Instead of venting out, the smoke began filling the entire space, and within minutes, it became impossible to breathe. This film tells the story of how I found a solution on the brink of failure and managed to salvage my project. You'll see how I made fire using flint and chaga fungus, built furniture from deadwood, and ultimately had one of my most dangerous—yet successful—underground overnights. A small challenge for this video: I'm trying to speak to you, my international audience, in English. Let me know in the comments what you think about it! What to expect in this video: 🔥 A Dangerous Mistake and Rescue: The real moment the cave filled with smoke and how I got out of the situation. ⚒️ Stone Age Building: How I made a bench, a bed, and a door inside the cave using only natural materials. 🪨 Primitive Fire Making: Creating fire without matches using flint and chaga fungus—a spectacular and effective method. 🏠 Results of a Risky Experiment: Whether it was worth it and if I finally managed to spend a comfortable night in my stone shelter.