When the door shut, you growled and looked around. Great, another trap. At this point, you are downright frustrated, but this doesn’t mean you're dumb.
You took a deep breath and opened your palm, a fire orb forming on it, before hurling it at the door. It just instantly melted the door, allowing you to run through. You began storming straight ahead. You've had enough of this lil’ coward! You demand she comes out now, so we can settle things.
You eventually reach what looks like a dead end, until you notice a ladder leading up to what looks like a hatch. That could be the way out, or just another trap.