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, There is no reaction, but, as he had moved closer to skid his sword, he is now able to ascertain that the object in the floor is some kind of oval gem or stone. you decides to skirt around the room, in an attempt to make it to the door on the other side of the room.
DM: As the floor ramps down towards the center, you follow it along the wall. Making your way across, looking. You notice as you go across the wall, there are three more of these same opal stones embedded in the wall about shoulder height.
Player: In the wall?
DM: In the wall as you go across.
Player: Is it one in the middle and then one in the center of each wall?
DM: On just on your wall--
Player: Just on my wall?
DM: Just on your wall, there's three along the way. There's one in the center of the room in line with the central opal, and there's two to the sides of it about four feet from each other.
Player: I've gone into a crouch, so I'm very low, butt dragging along the floor and just sort of--
DM: So you notice that. You skirt underneath.
Player: Leaning my back against the wall.
DM: Okay. They pass overhead. As you make your way underneath the three opals in this part of the wall. Making your way up the other ramp to the other side.
Player: Continued perception check?
DM: Make a perception check.
Player: Yeah. 23.
DM: Okay. You make your way up this side looking about on the floor. Nothing seems to happen, nothing catches your eye. You get onto this upper platform, and there is the door there in front of you.
Player: I check for traps on the door. That is a 24.
DM: The door does not appear to be trapped.
Player: Or locked?
DM: Does not appear to be locked. It does not seem to have a mechanism for opening other than if you wanted to try and push.
