Yep ...had this multiple times. It is what I look for.
One time is when things exploded with the dogs owner when I confronted the owners just before their dog's behavior became an emergency room visit for me. Another time, with another dog, I tried using 'noise and aggressive movement' and posturing and it too exploded into a blood-enraged dog trying to literally kill me. Think dog fight-- but you are the dog's adversary. It is a totally different world then a dog just menacing you.
I swear, I think we need ECQC with dogs or something.