  Two distant black holes can be connected in the interior through a wormhole.
Such a wormhole has been interpreted as an entangled state shared between two
exterior regions. If Alice and Bob send signals into each of the black holes,
they can meet in the interior. In this letter, we interpret this meeting in
terms of the quantum circuit that prepares the entangled state: Alice and Bob
sending signals creates growing perturbations in the circuit, whose overlap
represents their meeting inside the wormhole. We argue that such overlap in the
circuit is quantified by a particular six-point correlation function.
Therefore, exterior observers in possession of the entangled qubits can use
this correlation function to diagnose the collision in the interior without
having to jump in themselves.
