It's a fantasy role-playing game.

DM: You are Taryon Darrington, a human artificer . You are the member of the famous group of adventurers. Previously, You managed to, thanks to a very high roll from Keyleth, discover there was some sort of a waterfall or trickle of liquid near the hip of this giant titan. Its giant, four, swinging arms only managed to clip Keyleth and Vax once.
DM: Second one does save. First one does not. Rolled a natural 20 on its saving throw. The first one rolled a five.
Player: What did the second one roll?
DM: Natural 20.
Player: Oh fuck. Okay, that does. They both take 4d8 damage, and the one who didn't make his save gets pushed away, but he's right up against the wall.
DM: So it doesn't do anything. However, it does thunder damage, which they are vulnerable to, so they take double damage from this.
Player: Double damage?!
DM: You watch as the blast of thunder energy slams outward. Both of them, you watch as their bodies are thrown into the rock behind them.
