It's a fantasy role-playing game.

DM: You are Nott the Brave, a goblin rogue . You are the member of the famous group of adventurers. Previously, Caleb grapples it with Earthen Grasp. It manages to clean the tar off the lens, and breaks Caleb's concentration on the grapple by pinning him against the wall with a blade through the chest.
DM: It does roll past here, stopping at this point. It’d be about here, I think. As it spins in this direction, the things that drew its attention originally, which is Beau and Nott in that corner. Nott, you do get an attack of opportunity with a melee weapon, if you have one, but you have your crossbow out?
Player: I probably have my crossbow out.
DM: So yeah, you don’t do much of an attack there.
Player: I’ll hit it with my crossbow.
DM: Roll an attack. Improvised weapon for a melee.
Player: Yeah. 18.
DM: 18 just hits.
