Interesting exercise and a good one. Shooting IDPA matches, you face the hostage shot all the time.
Even more interesting is shotgun usage with hostages. This is for folks who blithely state - Home Defense, 12 gauge, Nuf' Said.
Patterning your gun and trying to skim a bad guy off the hostage takes some effort and under real stress would be 'fun'.
I won't even mention the Judge.
