This owners behavior is a example of everything that should NOT be done during a horse emergency. She's very lucky not to be seriously injured by her horse. Horses are not dogs, they instinctively want to stand up and your being in their way will not stop them when they are scared.
This is a great video for emergency rescue trainers to use showing owners what Not to do in an emergency. Owners get in the way and they hinder rescuers and they get hurt.Horses don't care about your petting and comforting words they are full of fear and want to stand up. Good way to get killed.
The Horse.com has great series of information on how to act during a horse emergency , horse in a pool, a bog or a trailer accident.
I hate to see these emotional pictures as they may led to other owners getting hurt in other emergencies.