My ex and I were cooking together and one of the pans got too hot, and we had a minor grease fire.
She grabbed a bag of flour.
As tempted as I was to slap it out of her hands, I didn't want to aerate a bunch of flour next to a grease fire, so I grabbed it with both hands and forced it (and her, because she wouldn't let go) over to the countertop, and then dropped the lid on the pan.
I asked her what her logic was, and she said "well, you're supposed to put baking soda on a grease fire and not water, right?".
"Yes. Why did you try to use flour?"
"What's the difference? They're both white powder."