It ain't the first time that has happened and it won't be the last. There have even been people who were attacked on jogging trails. It isn't common but it does happen, especially this time of year. Remember the video of the counter who got whooped badly by a deer while his wife filmed it? He brought that on himself though by putting buck urine on himself. Still, the deer could see it wasn't another buck he was attacking.
A few months ago, a buddy of mine, who lives in town, shot a coyote that went after his little boy as his wife was putting the kids in the car.