Yan Fei originally thought he was buried beneath the ground, but after he had collected that massive stone, he discovered that there hadn't actually been many rocks falling on him, and that very stone was the only thing pinning him down. The moment he collected the stone, the dirt and sand fell away, and no more obstructions remained above him.
Yan Fei jumped up from the rubble below and first controlled his muscles to continuously tremble, shaking off all the dust from his body and restoring his cleanliness. Then he looked back at the mine tunnel, now tightly blocked due to the collapse, feeling a sense of lingering fear. Fortunately, he was lucky that there weren't many rocks above him, otherwise, if he had been deeply buried, it would have been extremely difficult to crawl out.