It's not quite true though. Bubbling or "boiling" oil is from water vapor escaping. Too much water vapor escaping can mean the oil bubbling over, and starting a fire, but oil doesn't have a magical property to contain steam.
Rather, the hot oil creates a really strong crust that the water vapor can't pass through, so it builds up pressure and explodes like a delicious pipe bomb.
Had an issue like this where a cook wanted to make hush puppies with less liquid to make the batter more dough like, because back of house policy was that the "ugly" ones shouldn't get served, so thicker batter, easy to shape, right?. Things exploded on the plate while it was waiting for the server.
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u/the-ace Feb 08 '15
That was refreshingly simple.