  Observing and taming unusual effects arising from non-trivial light-matter
interaction has always triggered scientists to better understand Nature and
develop technological tools towards implementing novel applications. Recently,
several unusual optomechanical effects have been unveiled when subtle
spin-orbit interactions come at play to build up optical forces and torques
that are hardly seen in everyday life, such as negative optical radiation
pressure, transverse optical forces, or left-handed optical torques. To date,
there are only a few experimental proposals to reveal these effects despite
tremendous conceptual advances. In particular, spin-dependent lateral forces
and their angular analog are done either at the expense of direct observations
or at the cost of specific instrumental complexity. Here we report on naked-eye
identification of light-induced spin-dependent lateral displacements of
centimeter-sized objects endowed with structured birefringence. Its angular
counterpart is also discussed and the observation of left-handed macroscopic
rotational motion is reported. The unveiled effects are ultimately driven by
lateral optical force fields that are five orders of magnitude larger than
those reported so far. These results allow structured light-matter interaction
to move from a scientific curiosity to a new asset for the existing
multidisciplinary optical manipulation toolbox across length scales. In
addition, this highlights the spin-orbit optomechanics of anisotropic and
inhomogeneous media, which is just beginning to be explored.
