This thread really tugged at my heart. Your poor thing. How scared you must have been. I am so relieved to hear that your beloved dogs were not injured, just scared.

From what I read, quite a few have had a similar experience, myself included.
I was walking my Lhasa Apso Buddy along the side of my house toward the back lane when all of a sudden I looked up and this pit bull was running full force toward us. I grabbed Buddy up in my arms and almost dropped him as I was shaking like a leaf, and turned my back to the dog. The owner of the other dog was able to call his dog off, thank God, but I was just frozen in my tracks. After a few minutes I was able to compose myself and started yelling at the guy because he always has his dog off leash and this is not the first time this dog has done this.
I called our Animal Control and the guy got a nice fine and after that, he always had his dog on the leash.

I hope by now you have called the Animal Control. Maybe next time one or both of your dogs might not be so lucky or someone elses dog.