I ain't never seen the beat - You’re so shocked by someone’s nonsense that you just throw

You’re so shocked by someone’s nonsense that you just throw your hands up and give up talking.

My neighbor tried to start a band with his parrot. I ain't never seen the beat.

My brother proposed to a goat. I ain't never seen the beat.

My teacher made us do math during recess. I ain't never seen the beat.