It was luck-can't take the credit for it . She was (allegedly) looking for a tool, stepped on a 3S Li-Po that was charging on the floor in a ceramic bowl, ripped it off from the charger (leaving the plug in the charger!!!) and kicked the battery rolling. In the process, it shortened the newly-exposed wires on something and created quite a spectacular lightning bolt in a dark closet. Lot's of noise, too. Fortunately, the battery kept rolling and the short was momentary.

To this day, I do not know what she was looking for and why the light was out in the closet.... In any case. I spent the first 10 minutes explainign that this was not a booby-trap designed to keep her out and the secont 10 minutes giving a gentle but firm lecture on how it may be imprudent to mess with things that can cause fire.

Worked so far....

Oh, and the battery is still operational...