My spare key fab caught on fire in my house while I was at work. The fire had the opportunity to spread soot throughout the kitchen as well as ruin my overhead microwave with the smoke getting in the vents. Luckily my grandmother and a friend went to my house to let my dog out at just the right moment and was able to remove the dish the key was in and take it outside before it spread to the house. I called the fire department and the fire marshal conducted an inspection and determined that based on his findings, the key ignited itself.