"What did I do?"

Roxy just minutes after she returned from god knows where. During our morning walk she spotted a fox and bolted towards the woods. In a split second she dragged me down a hill and up another before leaving me in the dust. I don't even remember letting go of the leash but thank goodness I did or I might be typing this with one hand.   Nursing several scratches and bruises including one the size and color of a purple eggplant on my bum. I did find Roxy three hours later at the edge of a field - smelly and exhausted but she didn't have a piece of fur out of place. My guess is she either lost the fox in the woods or she had an early dinner.