It's a fantasy role-playing game.

DM: You are Percival de Rolo, a human gunslinger . You are the member of the famous group of adventurers. Previously, A devil enters the room, similar to Ipkesh but thicker and burlier. He takes one look around the room, notices that something is amiss and begins turning to leave and tell someone.
DM: I mean, it takes up the entire doorway, essentially, and it's just pivoting after it notices you guys, so you're gonna have to make a tumble check to try and make it past him.
Player: Oh, okay, hold on then.
DM: An acrobatics roll, but yeah.
Player: I'll-- you know what, I'll do the acrobatics roll to try and shut the door, and--
DM: Okay, so you're trying to, basically, as he goes to spin around, you dash forward, and roll into a tumble to try and pop up on the other side, so go ahead and roll acrobatics check.
Player: That'll do. 22.
DM: 22.
