  We argue that the region behind the horizon of a one-sided black hole can be
probed by an analogue of the double-trace deformation protocol of
Gao-Jafferis-Wall. This is achieved via a deformation of the CFT Hamiltonian by
a term of the form ${\cal O} \widetilde{\cal O}$, where $\widetilde{\cal O}$
denote the state-dependent "mirror operators". We argue that this deformation
creates negative energy shockwaves in the bulk, which allow particles inside
the horizon to escape and to get directly detected in the CFT. This provides
evidence for the smoothness of the horizon of black holes dual to typical
states. We argue that the mirror operators allow us to perform an analogue of
the Hayden-Preskill decoding protocol. Our claims rely on a technical
conjecture about the chaotic behavior of out-of-time-order correlators on
typical pure states at scrambling time.
