It's a fantasy role-playing game.

DM: You are Percival de Rolo, a human gunslinger . You are the member of the famous group of adventurers. Previously, They stumbled upon a small hive of basilisks that surrounded an obelisk of Ioun, which gave them their first clue as to the location where this sphinx could be found. They battled the basilisks, destroyed their underground hive, or at least the exit from it, via Fireballs and Stone Walls and other such endeavors.
DM: 15 points of piercing damage. As you (gunshot) rockets off, the sound cracks through the air. All the orcs now glance over in your direction, as the bullet streaks past them, tickling the bottom of the feet of the guy who's strung up, and slamming into the chest of the armored orc. Lands straight on his back on the ground right there.
Player: Cool.
DM: All right.
Player: All right. I'm going to move to my right six spaces and I'm going to take another shot at the guy who's right ahead of us, in front of the pit.
DM: Right there?
Player: Yeah, right there. I'm going to take a Sharpshooter shot.
DM: Go for it. You reload and then the third attack for the shot.
Player: Yep. Whoa, that's nice. 18, 19, 20, 21, 22, 23. 27. That hits. That's ridiculous.
DM: Is that even with Sharpshooter?
Player: Yeah. I rolled an 18.
DM: (chuckle) All righty.
Player: So that's a better roll? A better roll. That was a pretty good roll. 16, 17, 17, 27-- 33 points of damage.
DM: 33 points of damage. You blow that orc's head clear off its shoulder. Spray of mist comes out the top of his form, as he slumps down into the fire in front of him. Two other orcs look over at you, who are now clearly visible. (grunts)
Player: I put down the gun and I breathe.
DM: (chuckles) All right, that ends your turn. Brings us to Keyleth.
