>>539
Sensei commends your inorganic chemistry nous, knowing that, of course, H₂S + O₃ → SO₂ + H₂O, though he commiserates the fact that the H₂S content of his flatulence is rather low and would become negligible after having to make its way out of his combat armour and down the corridor to where you are.

He mutters something about Faraday cages and electrocution while removing his precious armour. He hangs it back up on the wall, along with the laser gun.

>>540
You join Sensei back in the small, dimly lit room. Without a word, you take the apparel he just relinquished and shove it up your skirt, into the hole between your legs. All of it disappears without a trace. Aware of the mysterious effect that the corridor has on metal objects, you also try to dispose of the fly of Sensei's trousers. At first he is uncooperative, but you prove quite persuasive. He removes his trousers to reveal a large bulge in his underwear. It's a Rubik's cube, of course. You think.

You succeed in nullifying the metal part of his trousers, but unfortunately also lose the rest of his trousers in the process, along with all the files and cleaning rags in the pockets. Sensei seems rather displeased by this turn of events.

You resume your stroll through the enigmatic tunnel, singing to yourself to maintain your spirits in the face of the darkness and strange, unpredictable events. The clicking noise resumes, again growing louder the deeper you go. You soon come to the files you dropped earlier, still blinking with angry little sparks. You feel warm all over. The clicking continues, like bones snapping, or teeth clashing together. You are really rather warm, more than is comfortable.

Just as you feel you are about to pass out from heatstroke, you catch sight of a light at the end of the tunnel. A feeble, dim light, but a light nonetheless. You rush ahead, and emerge into a small concrete room, startlingly similar to the one you just came from, but without the benches and hooks lining the walls. There are corridors leading to the East (where you just came from) and South (which is also completely unlit, and looks much the same). On the North wall is a ladder leading up to a closed metal hatch.

Sensei joins you a few seconds later, still lacking his trousers, and sweating profusely.