Quote Originally Posted by Pigkappa View Post
That's actually a place in another dimension. You can't even see through the window even if you notice it's there. I don't think you can toss anything inside.

Also, setting up a fire in a flooded room would be quite difficult =P.
I wonder if your PCs are watching that window closely, or do they assume they are safe inside and all sleeping?

If you know where the windows is, it might be fun to "prepare explosive runes this morning" right about where the window is. Those viewing the window from below as they climb out and wait for their companions might enjoy a warm reception to the day.