Clearly she’s doing something right.
Ooh Vibram fivefingers!
When you’ve given ALL you can to reach your goal.
It’s just you, the road and a sense of accomplishment.
The most common mistake I see is then people plant their foot WAY in front of their bodies and come down on their heels. Your foot should make contact directly beneath your center of gravity or maybe slightly in front of it, with most of the impact happening mid-foot.