  The invariance of the speed of light implies a series of consequences related
to our perception of simultaneity and of time itself. Whilst these consequences
are experimentally well studied for subluminal speeds, the kinematics of
superluminal motion lack direct evidence. Using high temporal resolution
imaging techniques, we demonstrate that if a source approaches an observer at
superluminal speeds, the temporal ordering of events is inverted and its image
appears to propagate backwards. If the source changes its speed, crossing the
interface between sub- and super-luminal propagation, we observe image pair
annihilation and creation. These results show that it is not possible to
unambiguously determine the kinematics of an event from imaging and
time-resolved measurements alone.
