Girl cantering along coolly until all hell break loose

4 horses in this lesson, 1 particular one is very sensitive to all rain elements. Spooked and his rider fell off upon thunder in a distance. Then the domino effect, second horse also spooked and threw rider off, following by the 3rd horse and the 4th. Only one rider barely managed to stay hanging on the horse's neck. Video was cut off shortly after the last rider fell.