In the quantum world, you don't have to throw it over the wall, you can throw it at the wall, and there's a certain non-zero probability that it'll disappear on your side, and reappear on the other.
但在量子世界里，你不需要将它从墙顶上扔过去， 你只要往墙上扔就好了，然后这个球会在你这侧消失并出现在另一侧，