It's a fantasy role-playing game.

DM: You are Scanlan Shorthalt, a gnome bard . You are the member of the famous group of adventurers. Previously, She dispels the effect, finds lose rocks to cave-in and attract the worms to. Vax uses dimension door to get next to Grog and throws a dagger while just out of range.
DM: As part of the spell you can either visualize a place you can see, or one you can describe by stating distance and direction. So you've already been inside the room, you know what it looks like, so if you think you're somewhat close by--
Player: So even if I've moved since I saw it last, I can still Dimension Door to where I think--?
DM: In theory, yeah.
Player: Okay, then I will do that. I will do that.
DM: Okay. Where do you want to appear within the room?
Player: I want to appear where Vex was before.
DM: Okay. So, you--
