Take a good, long look at the above diagram.
Here is the scenario.
Party A is walking into a grocery store and you are going into the same store behind him.
Quite suddenly a car pulls up and someone (Party B) gets out and immediately starts firing in your general direction.
Party A immediately stops, turns, pulls a gun and begins returning fire.
There is no hard cover.
You can't advance into the store without going through A and you can't retreat to the parking lot without going through B.
Because of the store layout you can't easily escape, either.
Do you engage?
If you engage, how do you engage?
Who do you engage first?
If you are instrumental in bringing down one party do you immediately turn to fire on the second party?
How do you see yourself handling this scenario?