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, The axe sinks deep into the arm, but does not deal enough damage to completely sever it. Percy, up on the roof, casts Hex on Kevdak, shadows stretching from Grog's own and clinging to the Thunderlord.
DM: I would say from your perspective on the rooftop, because he was turned this way and is facing this way, you would have a big ol' view of his back and shoulders.
Player: Okay. I'm going to take a shot for the elbow.
DM: On this arm?
Player: I'm going to try, yeah, on the visible elbow.
DM: Okay.
Player: I'm going to sharpshooter through that shit, see what happens.
DM: Go for it.
Player: Okay. And I'm happy if you want to put any weird disadvantage--
DM: You have advantage on the attack because he's paralyzed.
