Call us again when this happens in play.
That may sound callous, since it is a theoretical possibility, but here’s the trouble: How did it happen?
If you started the firefight, you shouldn’t have (you should have brought some right tools or found an infiltrator, at the very least).
If your opponent started the firefight, why are you fighting? I mean, if you’re sitting on top of something really valuable and he’s attacking you to get it, that should net you Superior Position, right? If you’re just out going for a stroll and he jumps you, why? Why not just make it a color scene? If your opponent is trying to assassinate someone, he paradoxically needs to make sure you have some dispo (because otherwise the fight is over before he can get in the Direct Fire or Close Combat maneuvers he needs to kill a member of your fireteam). (Cheater’s note: One way to boost your opponent’s dispo is to flub your contact roll intentionally. If your commander has a stellar Observation, make sure you roll your Beginner’s Luck Signals instead, don’t get help and don’t FoRK anything).
In short, I think if this ever happens in a game, it’s because you’re not paying attention to scene framing and you’ve just started a conflict scene where nothing is at stake.