What "should" you do?

[JOhn]

Originally Posted by Otter

Jump in the middle of them, start screaming at the top of your lungs about how you hate when they fight and start poking them in the forehead with hot dogs till they forget what they were fighting about.

Think outside the box

Seriously, call the PD. You have no idea what is going on. In 15 years working as a medic, I've seen more people get hurt trying to break up a fight...what happens as they usually both turn on you.
The only life threatening injury I ever received was from a domestic when the wife turned on me & stabbed me. Should have let her old man die after that shit!!