It's a fantasy role-playing game.

DM: You are Nott the Brave, a goblin rogue . You are the member of the famous group of adventurers. Previously, Fjord enters first, seeing signs of a fight and spatters of weeks-old blood. A 30-inch hole descends below the tree, and you goes first, using Feather Fall when she slips.
DM: The hole has chunks of rock and dirt as well as a very interwoven network of roots coming down from the tree, so it's fairly easy to climb down. There is a little bit of that damp water and moisture that seeped into the chamber previously from just being near the swamp. It wasn't a thick layer of water, maybe half an inch or so in the actual portions of the chamber and some of it is now heading down. As you're climbing down carefully through this hole, you can feel it running down your back and it's this cold swamp water. I need you to make an athletics check as you make your way down this chamber.
Player: Not great. Just a check?
DM: Yep. Just add your athletics.
Player: Seven.
DM: Seven. Okay. You begin to-- (grunts) and you lose your grip and begin slide down like a slide.
Player: (whispers) Yes. (screams)
DM: (impact) You get about maybe 15 or so feet before the back of the slide leaves you. You have darkvision, so you see the interior of some sort of chamber in the ground rocketing towards you--
Player: I will throw out a feather and cast Feather Fall.
DM: Okay. And you gingerly land on your feet. No damage taken. And no noise made either.
Player: (breathing heavily)
DM: Looking around you, you see the inside of a natural rock chamber. You can hear in the distance a rummaging sound, some shifting over from around the corner. It seems like from where you're landing the back is around you and then it curves to the left. You see a faint puddle before you lose vision and beyond that, you don't see anything but you hear (shifting).
Player: Coming towards me or just moving?
DM: Just echoing around the side.
Player: Cool.
DM: You hear a (monster hissing).
Player: Oh god.
DM: Something clatter to the ground. What are the rest of you guys doing?
