  Multiple pieces of evidence suggest that neutron stars receive large kicks
when formed from the remnant of a collapsing star. However, the evidence for
whether black holes (BH) receive natal kicks is less clear, reliant on weak
constraints from the analysis of BH X-ray binaries and massive runaway and
walkaway stars. Here we show for the first time that recent microlensing
detections offer a new method for measuring the kicks BHs receive at birth.
When a BH is identified through both photometric and astrometric microlensing
and when the lensed star has a known distance and proper motion, the mass,
distance and proper motion of the BH can be determined. We study the runaway
velocities for components of eccentric binaries disrupted during a supernova,
finding the peculiar velocity correlates strongly with the kick a BH received a
birth, typically within 20\%, even when the natal kick is smaller than the
orbital velocity. Therefore, by measuring the peculiar velocity of a BH or
other compact object that formed from a binary that disrupted during core
collapse, we are in effect measuring the natal kick that object received. We
focus on MOA-2011-BLG-191/OGLE-2011-BLG-0462, an isolated, single BH detected
by microlensing and consider a range of possible formation scenarios, including
its formation from the disruption of a binary during a supernova event. We
determine that MOA-2011-BLG-191/OGLE-2011-BLG-0462 has a Milky Way orbit
consistent with a thick disk population, but if it were formed within the
kinematic thin disk it received a natal kick $\lesssim$100 km s$^{-1}$.
