I Know This - Used by kids who are so annoyed they want to punch the perso

Used by kids who are so annoyed they want to punch the person telling them what to do. Usually a teacher or parent.

"I know this!" she said, after her dad told her for the 8th time to clean her room.

"I know this!" he yelled, after his teacher said he had to write 20 times, "I will not throw paper balls."

"I know this!" she said, after her mom reminded her for the 10th time to do her homework.