  Highly energetic particles traveling in the background of an asymptotically
AdS black hole experience a Shapiro time delay and an angle deflection. These
quantities are related to the Regge limit of a heavy-heavy-light-light
four-point function of scalar operators in the dual CFT. The Schwarzschild
radius of the black hole in AdS units is proportional to the ratio of the
conformal dimension of the heavy operator and the central charge. This ratio
serves as a useful expansion parameter; its power counts the number of stress
tensors in the multi-stress tensor operators which contribute to the four-point
function. In the cross-channel the four-point function is determined by the OPE
coefficients and anomalous dimensions of the heavy-light double-trace
operators. We explain how this data can be obtained and explicitly compute the
first and second order terms in the expansion of the anomalous dimensions. We
observe perfect agreement with known results in the lightcone limit, which were
obtained by computing perturbative corrections to the energy eigenstates in AdS
spacetimes.
