I noticed what I thought to be a grasshopper clinging to her back and tried to remove it with a blade of grass. That didn't work so I continued snapping pictures.
The mantis maneuvered around the grasses and plant stems and finally got to the fence, where she continued to climb. When I got the photos uploaded to my computer I discovered, to my embarrassment, that the passenger was . . . er . . . rather firmly attached and that the twosome apparently had been caught in flagrante delicto.