It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, A scuffle ensues as they chase down a necromancer, a number of cultists, and some creatures from the Shadowfell. During the fray, Scanlan gets Sprigg back on his feet, and Keyleth kill a couple of the cultists with a Firestorm.
DM: I will say, at proximity to the flames that are starting to catch, you do take three points of fire damage.
Player: Fine.
DM: You threw the dagger at the big guy?
Player: Whisper goes to the window at that guy there.
DM: Go ahead and roll an attack.
Player: And it's flanking, right? Because of where Grog is, or Keyleth?
DM: It's not flanking, but you get to add sneak attack modifier.
Player: Okay. Yeah, that's fine. That's 32.
DM: Yeah, that hits. So you appear next to it.
Player: Three plus psychic damage is four plus this junk. (counting) 33, doubled to 66 plus psychic damage is 74. Bamf there.
DM: And you appear next to it. As the dagger sinks into its torso, you watch as its chest muscles and the iron cage-like armor around it seems to swallow the dagger. As it goes inside, you watch as some of the muscles all of a sudden (squelch) fall off of its body, like whatever energy's holding it together is untethered and this weird, fleshy, stitched-together creature is starting to fall apart. It's looking pretty hurt.
