Well, let me tell ya. Years ago I deep fried something or another, turned off the fry daddy and fed my kids dinner. As I washed dishes I saw my son flicking water into the still hot oil for the popping effect. Evidently, he continued this until the oil had cooled and continued putting more and more water in. I am guessing that an ounce or three wound up settling in the bottom when the oil finally cooled.
Next day: I am at work, kids are at school, and my mom who lived with us briefly decided to fry something using the oil from last night...
The water which had settled to the bottom of the fryer (obviously, she nor me realized), became super heated to 350+ degrees, and just as she dropped in her French fries, or whatever, the whole mess frigging EXPLODED! She was wearing a night gown and wound up with some serious burns on her neck, chest, arms and tops of her bare feet. The entire kitchen, including the ceiling were coated in oil.
The foot tracks in the carpet to the bathroom were still there when we moved out.
My son still hates to hear this story.