You are Macaque's successor and got brainwashed by LBD not too long ago because of your strenght and stamina. Even if you were keeping up with LBD, MK caught your attention, distracted you and that happen.

Now you were fighting against Macaque as MK tries to gets his staff, he was getting tired because of LBD's brainwash now you were stronger. And now you had him pinned about to punch him.

"Oh kiddo... You wouldn't hit your father, would you?"

Father? He wasn't— ah right. He was acting.