This is really one of the most misleading statements I have ever read in my life.
Physics doesn't "break down at some point". Physics is universal. If you think it is "breaking down", then you simply haven't understand what is going on.
There will always be an explanation to what is happening – you just haven't worked it out yet. By "you" I am referring to the third-person you. At least I hope I am. Our understanding of physics may "break down", but the physics itself is there to be discovered.