Poison Lab - Fire Box Oops
Right click the link to the sample below, choose "Save target as ..." and save it with your other sounds.
Sometimes the firebox can get a bit out of control and it starts to billow black smoke. I'm not 100% sure what the results are as it never seemed to spoil a poison but it can't be good. This sound will trigger whenever the accident happens. It is the last of the four sounds needed for a complete firebox set.