  Using adiabatic point-particle black hole perturbation theory, we simulate
plausible gravitational wave~(GW) signatures in two exotic scenarios (i) where
a small black hole is emitted by a larger one ('black hole emission') and (ii)
where a small black hole is emitted by a larger one and subsequently absorbed
back ('black hole absorption'). While such scenarios are forbidden in general
relativity!(GR), alternative theories (such as certain quantum gravity
scenarios obeying the weak gravity conjecture, white holes, and Hawking
radiation) may allow them. By leveraging the phenomenology of black hole
emission and absorption signals, we introduce straightforward modifications to
existing gravitational waveform models to mimic gravitational radiation
associated with these exotic events. We anticipate that these (incomplete but)
initial simulations, coupled with the adjusted waveform models, will aid in the
development of null tests for GR using GWs.
