Kicking a rock or eating an apple

Suppose someone claims that he can easily refute Berkeley's idealism by simply kicking a rock or eating an apple. Does this demonstration show that Berkeley's view is false? Explain. Hume thinks that all knowledge must be traced back to perceptions; otherwise, assertions of knowledge are meaningless. From this, he concludes that all theological and metaphysical speculations are worthless. Do you agree with him? Why or why not?