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, She smells an sharp, chemical odor down that tunnel as well, and determines that the Briarwoods must have their acid pits down that side. By now, the party has traveled so far from the castle they are nearer the outskirts of Whitestone.
DM: All right. Continuing to push forward, about another five minutes or so, keeping track of your distance to the castle you're starting to get towards the outside perimeter of the actual city itself. As you're keeping tabs on distance traveled to that area, you catch, based on your last perception roll, there is a portion of the floor that seems to have some placed crooked chunks of stone. You see pieces of broken stone here and there, things that have fallen out from being hauled from the distant dig into wherever the ziggurat is, but there's one section where it appears there's platforms.
Player: Looks a little hinky?
DM: It looks like it's deliberately placed, as opposed to dropped and left there.
Player: I'd like to carefully approach and disarm anything I can detect or find.
DM: Okay. Go ahead and make a check.
Player: Is that thieves' tools?
DM: That's thieves' tools, yeah.
Player: That's a 27.
DM: Okay. You find two of the large stone slabs that are part of this discarded sequence here, they have beneath them some small magical burst that is waiting to detonate. You manage to mark it and take a couple of other stone pieces to wedge underneath it to prevent it from depressing onto whatever the trigger may be, and note to the rest of the party to avoid that section.
