Not sure if you'd call it a failure or success, but when I was 12 or so, a friend's parents were getting all new appliances for the kitchen, and being the type of 'throw them into the world and see what happens' parents they were, they allowed us to do whatever we wanted with the old appliances. We armed ourselves with a bowl of emergency water, and went at it.
The microwave sparked and nearly exploded when we nuked a bowl of cutlery...in retrospect, it was a bad idea that could have ended with flying glass shards.
The toaster caught fire when we slathered two pieces of already blackened toast with jam, then toasted them again, allowing jam to seep deep inside the toaster. We threw the water on it, and it made a bunch of weird noises. Not sure if we would have gotten electrocuted if we touched it, or what.
My worst accidental kitchen failure was getting burned by my ramen, and launching it across my flat, right onto my cell phone. The phone miraculously survived after leaving it out, open long enough for the water to evaporate. Other than that, I'm very good in a kitchen.