  We demonstrate that at sufficiently high energies where the eikonal regime is
established for hadronic interactions, the double scattering subprocess can be
clearly identified and isolated in quasi-elastic deuteron
electro-disintegration processes. Comparing theoretical calculations with the
recent high precision experimental data we present a ``proof of principle" that
these processes can be used to study advanced issues related to hadron
formation in QCD. In this case, the double scattering represents as a
fermi-scale ``detector" which probes products of high $Q^2$ scattering from the
bound nucleon through their rescattering from the spectator nucleon in the
deuteron.
