You should be able to facetime 911 in situations that would benefit from an instant witness at your side.

In an abusive relationship? Dial and Point. Suddenly a cop (or authority-ish figure) is staring down the offender and it may be enough to stop them in their tracks.

Getting Robbed? Well then saying "Hey Siri, Facetime 911" might actually get you shot/stabbed. Or saved, who knows?