What does (someone) think (someone) is doing?

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What does (someone) think (someone) is doing?

Why is someone doing this thing that they should obviously not be doing? What on earth do you think you are doing? You're going to burn the whole house down if you try to use the oven that way! Just what does he think he's doing? You can't move that much money between accounts without raising a red flag with the feds!
See also: does, think, what