It's a fantasy role-playing game.

DM: You are Caduceus Clay, a firbolg cleric . You are the member of the famous group of adventurers. Previously, Nott says she thinks its 50-50 Fjord is going evil and suggests Caleb be ready to restrain him. Fjord casts Underwater Breathing on the group and they descend.
DM: One hits you for six points of piercing damage, as it claws-- or this would be a bite. It grabs and bites towards you.
Player: Reduced to half?
DM: Oh, no, it's a strike, so bludgeoning. It's halved to three. You take three points of bludgeoning damage. This one is going to attempt to grab you with the tentacle. Natural 20.
Player: Does he get a bonus for that natural 20? Does he get some sort of bonus to that natural 20? Does that make something better about that?
DM: You don't know.
Player: I mean, because I'm going to cancel it, if it does anything.
DM: It's a critical hit, up to you. Are you canceling it or not?
Player: I'm canceling it.
DM: Okay. It still hits, but it's not a critical. You take eight points of bludgeoning damage, reduced to four, and you are grappled. As its tentacle reaches around you, another one that looks like it has a protrusion from its chest, almost like a third arm-- it's a tentacle that wraps around, and grabs at your torso, and is crushing you. You can feel faint bits of it that are scraping at the skin. That finishes their turn. Beau, you're up.
