It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, you waits for Vex to return from her walk with Percy. He tells her to keep both eyes open and Vex says she is very perceptive.
DM: As you approach the door, you look down and see a smear of dark, reflective oil across the walkway about two feet leading up to your room. You guys have a cluster of rooms in this long hallway, and it arcs around like an L. So you guys are in this big L of all your rooms scattered throughout.
Player: How thick is it? Is it viscous?
DM: Yeah, it's pretty slippery.
Player: Put my hand in it. Does that stay?
DM: The hand stays for a minute, then--
Player: Goes away.
DM: Yeah, it's pretty thick.
Player: All right.
DM: Also has a fume to it.
