Saw a woman get thrown from a horse in the park this morning.

Dog bolted down from the hill and snapped at the horses legs.
The riding instructor yelled instructions at the pupil, but the horse reared.
Unfortunately the animal had pirouetted off the soft dirt track, and onto the asphalt pathway.
Wasn't much of a sound from the impact of the woman hitting the ground.
She didn’t move at all. Horse cantered off.

Guy in Lycra bolted over, and several walkers had their mobiles out, and the ambo was there within 15 min (I reckon.)
Instructor eventually rode off to find the horse.

Usually when I see dogs cut loose and ‘go for a horse’ the owners are pretty much onto it immediately, and drag the dog off.
The owner of this dog (looked like a blue heeler mongrel) didn’t seem to know that the dog had gone until after the woman had hit the ground.