Are all dogs scared of lawn mowers?

This is a question out of curiosity, but i have a year old labradoodle that is spoiled to death and is treated extremely well and I got her from a pretty sketchy breeder when she was 7 weeks old, and I never really noticed until today that she is terrified of lawn mowers. I was mowing the lawn today and I had the lawn mower sitting between my dads SUV and my house, with about 5 feet for me to walk through with out touching the mower and so I grabbed my dogs collar and started walking to the yard and when I got about 6 feet away from the mower my dog started shaking and her tail went in between her legs and she started crying and she wanted to go back into the backyard. I Had to pick up my 76 pound dog and carry her around the mower, she was that scared. I was wondering are all dogs terrified of mowers or do you think my dog was some how abused or hurt involving a lawnmower before I got her?