Damian knows Kara was not smarter than him as a baby since Kryptonians only get cheat powers when they bathe in the yellow sun and she was already a teen when she arrived on Earth. X)<br/><br/>Batman knows Kara is capable of oneshotting him. He also knows she will never do such a thing no matter how much she tries to act as if she will. Dont threaten the Bat. X)