  Perturbative dynamics of gravity is investigated for high energy scattering
and in black hole backgrounds. In the latter case, a straightforward
perturbative analysis fails, in a close parallel to the failure of the former
when the impact parameter reaches the Schwarzschild radius. This suggests a
flaw in a semiclassical description of physics on spatial slices that intersect
both outgoing Hawking radiation and matter that has carried information into a
black hole; such slices are instrumental in a general argument for black hole
information loss. This indicates a possible role for the proposal that
nonperturbative gravitational physics is intrinsically nonlocal.
