Up in Flames!!!!

The other day when I got home from work I was going to turn on the propane heater to warm the bathroom up a bit.  I noticed the pilot light was out so I tried to start it but to no avail.  So I looked behind the heater at the propane tank and someone had disconnected the line form the tank so I attached it to the tank and turned the heater around and started the pilot light and then turned the heater on,  As I walked out of the bathroom I heard a swoosh!  I turned around and flames were shooting up the wall behind the heater.  I quickly turned the heater off and pulled the heater away from the wall as the flames were right below the bath towels.  I started blowing on the flames trying to blow them out.  Luckily I was able to get them out and removed the tank from the hose.  Evidently I hadn't made a good connection between the tank and the hose.  Needless to say I was lucky.