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, Tary and Grog see Utugash making some unknown gestures in the air with one hand. you pushes past Tary and climbs through the window to get in range.
DM: Okay, so you step through, you get about there. You have ten feet more movement. So that'll do it. All right, so.
Player: Can I Blight and then back out? Back through the window?
DM: You're not going to have enough movement. You'll get up into the window. You won't get all the way through.
Player: (grunts) Shit!
DM: That is a 21. What's your DC?
Player: Fuck! Are you serious? 20.
DM: Yeah, so takes half damage. Go ahead and roll damage.
