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, Vex and Grog check for tracks, but Grog discovers that there are a cluster of tracks from around seven people that are a day old at most that lead into the tunnel. Percy, Vax, and Keyleth suddenly notice a drop in temperature and, looking around, they notice in the darkness something that the half-elves had faced once before, in Vasselheim: ghosts.
DM: All right. Percy, you're up first. You glance around, and you can see the two entities going (hiss) towards you, towards Keyleth, and you glance over your shoulder and see one drifting out of the distance towards Vax.
Player: I yell, "Look out!" And I take several steps toward Vax.
DM: To there?
Player: Actually, on the other side of the pillar so I can actually see the one that's getting towards him.
DM: There?
Player: Yeah.
DM: You won't be able to see this one, just those. This one actually will block your view to that one. These are about ten feet tall. These are the little sections here, so right now, you would be able to see these two here and barely see this one. It would have three-quarters cover. Which you ignore, with Sharpshooter.
Player: I know. I want to back up into that corner, though, just to get away from them.
DM: Over here?
Player: Yeah.
DM: Okay, so you can see one of them right now.
Player: I'll take-- fuck. Yep, screw it. I'll take shots with the Pepperbox.
DM: Okay.
Player: I'll take my first shot.
DM: Go for it.
Player: That can't be right. Just checking. 20. Natural 20.
DM: Okay.
