It's a fantasy role-playing game.

DM: You are Vex Vex'ahlia, a half-elf ranger . You are the member of the famous group of adventurers. Previously, Trinket, who had been sleeping outside Percy's workshop, attacks the one next to Percy. Jarett gets up and runs to the cell, unlocking the door.
DM: It swings towards you, and a giant slam of extremely condensed air with a raking claw impact hits you in the torso, doing 15 points of bludgeoning damage. The other one swings out, same direction. This time you actually pull off to the side and knock it out of the way with your Pepperbox. The one back there is going to attempt to grapple. Succeeds. That's its action, and you can see the driver that you had put into prison is currently being (choking) making strangling sounds in the distance. That ends it. Trinket's up.
Player: Trinket. He can see Percy getting attacked and instinct takes over, and he runs forward and he claws him.
DM: All right, go ahead and roll for the attack.
Player: That does not hit. That's a natural 20.
DM: That will hit!  It begins.
Player: Oh, that's the wrong thing. That's a 2d4.
DM: So roll 2d4 and then multiply those by two.
Player: 17 damage.
DM: 17 damage, nice. Trinket runs up, coming out of his somewhat sleepy stupor, goes for a bite attack and grabs nothing with it, and turns around and rakes a claw backwards, manages to get the back of whatever this entity is, and you hear it scream (gasping scream). You do, at least.
