He struggled in the dimness of that shaft towards the only source of light, dragging himself through the tight confines and shouting in frustration more than once when he felt stuck between the rocks. He persevered and pulled himself through until he finally felt free of the noxious gas. Then he fell again as he spilled forth from the crack in the wall. He tore the rag from his face and hacked violently, taking in greedy breaths as his eyes stung and watered. He couldn’t see, but just barely made out the bleary source of light ahead of him.