  The discovery of the `Lorimer Burst', a little over a decade ago, ignited
renewed interest in searching for short-duration radio transients. This event
is now considered to be the first established Fast Radio Burst (FRB), which is
a class of millisecond-duration radio transients. The large dispersive delays
observed in FRBs distinguish them from the individual bright pulses from
Galactic pulsars, and suggests that they originate deep in extragalactic space.
Amazingly, FRBs are not rare: the implied event rate ranges up to many
thousands of events per sky, per day. The fact that only two dozen FRBs have
been discovered to date is a consequence of the limited sensitivity and field
of view of current radio telescopes. The precise localization of FRB 121102,
the first and currently only FRB observed to repeat, has led to the unambiguous
identification of its host galaxy and thus proven its extragalactic origin and
large energy scale. It remains unclear, however, whether all FRBs are capable
of repeating (many appear far less active) or whether FRB 121102 implies that
there are multiple sub-classes. Regardless, the repetitive nature of FRB 121102
and its localization to within a star-forming region in the host galaxy imply
that the bursts might originate from an exceptionally powerful neutron star -
one necessarily quite unlike any we have observed in the Milky Way. In these
proceedings, I give a very brief introduction to the FRB phenomenon and focus
primarily on the insights that FRB 121102 has provided thus far.
