It's a fantasy role-playing game.

DM: You are Mollymauk Tealeaf, a tiefling blood hunter . You are the member of the famous group of adventurers. Previously, The party completes a short rest and goes back to the first room they found. Caleb uses Unseen Servant to insert the rod into the hole in the central platform while the party waits outside.
DM: As you look going through, you see there are a few other stone cages that have been opened and left empty. That is one that has not been removed.
Player: I'm going to open it and I will-- I'm going to poke at it to see if it seems trapped or anything.
DM: Okay, make an investigation check.
Player: All right. 16.
DM: Does not appear to be trapped.
Player: I'm going to open it and grab the stone out.
DM: Make a strength check to try and wedge it from the stone it's attached to.
Player: That's a six.
DM: (grunting) It's not budging. Your lithe tiefling form is not quite sturdy enough to pull it from the stone.
