When wiring goes bad
Wiring and electrical connections tend not to last very long in the high temperatures and humidity of the Daintree rainforest. This well-cooked double adapter, formerly located in the dry room, became corroded by the tropical climate. The corrosion increased the electrical resistance inside the adapter, making it run hotter than it normally would and making it susceptible to further corrosion. Eventually it got hot enough to self-destruct. Luckily, it didn't start a fire.