  What if someone built a "box" that applies quantum superposition not just to
quantum bits in the microscopic but also to macroscopic everyday "objects",
such as Schr\"odinger's cat or a human being? If that were possible, and if the
different "copies" of a man could exploit quantum interference to synchronize
and collapse into their preferred state, then one (or they?) could in a sense
choose their future, win the lottery, break codes and other security devices,
and become king of the world, or actually of the many-worlds. We set up the
plot-line of a new episode of Black Mirror to reflect on what might await us if
one were able to build such a technology.
