  Gravitational waves can teach us not only about sources and the environment
where they were generated, but also about the gravitational interaction itself.
Here we study the features of gravitational radiation produced during the
scattering of a point-like mass by a black hole. Our results are exact (to
numerical error) at any order in a velocity expansion, and are compared against
various approximations. At large impact parameter and relatively small
velocities our results agree to within percent level with various
post-Newtonian and weak-field results. Further, we find good agreement with
scaling predictions in the weak-field/high-energy regime. Lastly, we achieve
striking agreement with zero-frequency estimates.
