Then you put some angry subatomic particles in with the cat, close the box, and get a big, surly, strong guy to shake it real hard for fifteen minutes. The cat did and did not get something in his eye. Once you open the box, that all changes. The cat might also have gotten something in his nose and sneezed himself into a whiplash. Or it may have been from all the shaking.
Nobody knows, and that is quantum physics.