  Coupling of angular motion to a spin degree of freedom gives rise to various
transport phenomena in quantum systems that are beyond the standard paradigms
of classical physics. Here, we discuss features of spin-orbit dynamics that can
be visualized using a classical model with two coupled angular degrees of
freedom. Specifically, we demonstrate classical 'spin' filtering through our
model and show that the interplay between angular degrees of freedom and
dissipation can lead to asymmetric 'spin' transport.
