商用friendly fire~~
http://legal-dictionary.thefreedictionary.com/Friendly+Fire+(disambiguation)
A fire burning in a fireplace is regarded as a friendly fire, in spite of the fact that extensive smoke damage might result there from. Ordinarily, when an individual purchases fire insurance, the coverage does not extend to damages resulting from a friendly fire but only to loss resulting from an uncontrollable hostile fire.
(放火燒自己間舖?)
