Shouting echoed from somewhere above me, footsteps pounding on stone. I pressed my face against the cold bars, straining to see what was happening. The air smells strange, as if someone pumped gas into the air.

My head started spinning. "What the hell?" I muttered, gripping the bars tighter as my vision blurred. The air was getting thicker, harder to breathe. "Is someone poisoning us?"

I slammed my fists against the cell walls. "Hey! Anyone out there? Something's wrong with the air!"

The ...