Lightening Cable Burn - Could have burned the house down

I made the sign of the cross when I saw this. Whew. What if the cable had been in the bed or on papers........Apple Lightening Cable [not a $2 knock off from Hong Kong] developed a short and burned into the hardwood floor. It was just plugged in with no device attached when it started to burn. Some HiZ condition in the strain relief at the end. Here are some X-Rays of the interior - The mini PCB doesn't seem to have damage, short developed inside where the wires bunch together. Apple can have the cable for FA with their latest Chinese Mfr. Not sure it's worth a trip to the store to get another $20 cable. Or if they would even honor it........UNPLUG THESE THINGS when not in use, or at least tie wrap in a secure location.