It's a fantasy role-playing game.

DM: You are Keyleth, a half-elf druid . You are the member of the famous group of adventurers. Previously, The party tear into the cherub creature while it summons lava from the ground beneath them, traps you and Grog in the earth, and attempts to freeze Vax in a casing of ice. As it takes heavy damage, the creature unleashes a burst of radiant energy from its chest, doing a huge amount of damage to everyone close by.
DM: Yeah, that misses. MARISHA; Okay, but that one is a natural 20. As you reach up out of the ground from underneath, (impact noise) your fingers clasp around the celestial baby and (whack) slam it into the ground as hard as you can. Go ahead and roll damage on that. 2d8 plus five, so roll the 2d8.
Player: And then you double the 2d8.
DM: You double whatever you rol for the 2d8 and then add plus five. Crit that baby. It's our next t-shirt: Crit that baby!
Player: Six doubled, which is 12, plus five doubled, which is ten, so that's 22.
DM: The bonus isn't doubled. Just the dice.
Player: I know. Just the dice is 22, plus five. So 27.
DM: That's great. 27 points of damage. (wham) Slamming onto the ground. As your hand retracts up, you can see the wings are-- as it starts to fly up, it (gasps).
Player: And I just want to hold onto it and be like, yo! Yo, air elemental! And then let my air elemental come over and do its thing. Double slam attack.
DM: Go for it.
Player: Slam attack. No, I'm going to do a multi attack. Two slam attacks. So 2d8 plus eight, once again. That's an 18 and a 17. Plus eight.
DM: 18 and 17 plus eight?
Player: Yeah, so 26 and 25.
DM: Both hit. Go ahead and roll damage.
Player: Which is 3d8 plus two. So the first one, oh! Six, seven, eight, plus seven, which is 15. For the first one, 15 plus two. 17. And then the second one is eight, plus two fives, which is 18 plus two, so 20.
DM: Nice.
