It's a fantasy role-playing game.

DM: You are Grog Strongjaw, a goliath barbarian . You are the member of the famous group of adventurers. Previously, Ghurrix then slams his tail into Vax and follows that attack by swinging his mace in a backhand motion, but it whooshes over the rogue's head. The pit fiend flies down to the other side of the building, staying out of sight of the rest of Vox Machina.
DM: 16? No. Now, the erinyes, which is up against you, Grog, let's see. Yep! It's going to go ahead and first reach off to the side and take its rope that it has. Throws it out in your direction. The rope suddenly sparks to life like a magical snake and begins wrapping around your body rapidly.
Player: Not nice.
DM: All right, go ahead and make either a strength or dexterity check.
Player: I have advantage on both. No, strength. Natural 20.
DM: No effect.
Player: I did not do that in a gloating way, because I feel like that was very lucky.
DM: The rope that tries to wrap around you bursts off and whips back to the side. The erinyes is now going to attempt to fly back and away from you, which is going to offer you an attack of opportunity, Grog.
