Ignoring the princess' gesturing, you take position by the doorway. She is able to walk around and comes over to tug on your sleeve, continuing to gesture at the hole in the ceiling. You stall for a few moments, pretending to listen to the commotion outside, when the entire building rocks back and forth and a thunderous boom echoes through the city.
You look frantically at the girl, who returns your gaze with horror and surprise. The cries outside are now much louder, as the people are all frightened and the unmistakable hiss you heard at the cave entrance can now be heard coming closer. You gesture for the girl to wait here and proceed to make your way to the entrance.