It was this deliberately, kind of, jangly, jokey children's joke rap track.

是故意的，有点刺耳，开玩的儿童唱曲目。

The belief that this time, the pull of a lever will bring flashing lights and jangly music.

一次，拉动控制杆就会带来闪烁的灯光和刺耳的音乐。