Sad to read, but its true, the guys went to sleep and coals ignited the couch sofa….
Burning hookah coals cause 2 deaths :
http://www.vicnews.com/portals-code/list.cgi?paper=36&cat=23&id=1051050&more=0
Be smart around the hookah.  Play it safe. A good idea is to get a big  square of sheet tin thicker than tin foil for permanent use under the hookah to save on dirt, burnt holes in the wood or rug, Keep in mind that if  the round coals fall, they roll away far from the narghilah and could cause a fire, or burn someone nearby.
Read the article, its true to life.
http://www.vicnews.com/portals-code/list.cgi?paper=36&cat=23&id=1051050&more=0
http://www.vicnews.com/portals-code/list.cgi?paper=36&cat=23&id=1051050&more=0