Spirited: In the first instance, there are no such entities as "physical" laws. As with dreams, memories, opinions, presuppositions, ideas and reason, laws are of the unseen dimension. A falling object is a temporal manifestation of an unseen 'law' or limitation: gravity. Furthermore, if you were asked to provide "physical" (sensory) evidence of your dreams and memories you would not be able to do so even though every person experiences dreams and memories.
Next, there are only two possible answers regarding the existence of unseen laws: the personal Creator or nature--void, matter, energy.
The difference is that I can conduct an experiment to observe a take measurements of a falling object, and tell you how to reproduce that experiment so that you should be able to make the same observations and measurements. I cannot tell you how to reproduce a dream.