I don't think that dogs running around loose are nearly as common as they used to be.

My best dog story is probably 35 years old. I was riding with my neighbor in southern Michigan when a medium size dog came running full speed down a hill at us. My riding partner yelled "SIT!" in a commanding voice. Well, that dog certainly knew that command. He planted all 4 paws but his momentum caused him to do a couple of somersaults before coming to rest in a perfect "sit" position.