Actually, correcting myself, it should be obvious but not as important as the character and what he's doing. So I suggest to keep the composition simple and easy to read.
Play around with things like wall tapestry falling, flames/smoke going up would be enough. As for the room, it depends on the story you want to tell in the image, but I think a bigger room would be better. Also remember that his hair and clothes should be falling to the ground direction.