The Dangers of Gases

I've been exploring all kinds of places on and off for a long time now. In buildings with structurally questionable stairs or floors you learned very very quickly to tread carefully. As seen a guy fall right through a floor he thought was solid thanks to some random leak leaving a patch of moldering timber. His night ended in the back of an ambulance with a huge wood splinter in his leg. Then there's the tunnels, catacombs, anywhere underground where you can get what we call bad air. This is when you get spots of concentrated CO2 and underground places with bad ventilation. It's super easy to just blunder into the places where you suddenly start feeling out of breath.