I thought all those things, too, OC, but then I remember when Ella slipped out my front door when my son came home from school. And I remember when she bolted across the street and attacked my neighbor's boxer and I remember how it ALL went in slow motion like a bad dream. Seriously. It was like I knew what to do, but it was going so slow and I couldn't move fast enough and my muscles went to crap.
I DID, however, do a stupid thing and grab Ella's mouth and pry her mouth off the other dog. I did NOT get bitten. But she had slipped her collar so I had NO tools to get her off the dog with. It's too hard to pry a mouth off another dog, and pick the dog up before she grabs back on. I did it, BUT not for long because Ella jumped out of my arms. You almost freeze in situations like that sometimes.
It's a horrifying experience and I NEVER EVER want to go through that again. But I now know what my dog is capable of and I have to expect she'd do it again if given the chance, so I take all the necessary precautions so that it DOES NOT happen again.