  Matter falling into a Schwarzschild-AdS black hole from the left causes
increased focussing of ingoing geodesics from the right, and, as a consequence,
they reach the singularity sooner. In a standard Penrose diagram, the
singularity "bends down". We show how to detect this feature of the singularity
holographically, using a boundary two-point function. We model the matter with
a shock wave, and show that this bending down of the singularity can be read
off from a novel analytic continuation of the boundary two-point function.
Along the way, we obtain a generalization of the recently proposed thermal
product formula for two-point correlators.
