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, With that, the first timer runs out, and the ceiling of the chamber slams shut. This leaves you and one of the planars up in the tower, separated from everyone else below.
DM: Yes, you can. The planar is still holding on to the back of your head, it's going to make another strength check.
Player: I'm going to try to tail whip him. Is that a thing I can do?
DM: Make an athletics check.
Player: Okay. Oh, I have a red dice, it's so perfect and I never choose this one.
DM: What did you roll?
Player: Oh, okay, well. What am I adding to it?
DM: Add your strength modifier. If there isn't an athletics score, then whatever your strength modifier is.
