Hearthman --- I don't think the picture you have with your posts is quite adequate for posts discussing the risks of equipment.
In fact, you probably need three or four pictures. The first could be of a nice fire like the one you have. The second would show the fire flashing over into the room. The third would show the room engulfed and the fourth the whole house engulfed. An optional fifth could be of the charred timbers the next day.
I continue to be amazed at the risks people take with unvented equipment. Of course, fire isn't the major problem there.