Why I do not intend to ride a horse ever again

When I was in school I had a horse crazy friend who persuaded me to follow her to a camp for horse crazy kids. During a weekend you would be able to ride horses if you cleaned their poo and cleaned the horses and gave the food and so on. So small kid butlers for the horses. We arrived and installed ourselves in rooms with lots of beds for all horse lovers and I. I had never been riding a horse before so I was given the kindest horse they had. A real mountain of muscles! It was huge! I climbed up and was riding with a few other horses in a paddock. There was a naughty horse who suddenly kicked my horse´s buttock and my "kindest horse of the stable" suddenly stood on his 2 legs and not his 4 legs. So, I flew off the horse onto the ground between the muscle legs who just missed me. I survived with only bruises. The horse loving manager said: - Now you must up quickly again and sit on the horse otherwise you will be scared for the rest of your life. So, I sat on the horse again so scared but I did not show it. I asked them: Can I jump down now? 
Have I been sitting here long enough?
It was time to go to bed. Some kids thought it was fun to go through my things and took my shampoo and poured it out and put toothpaste in the lid of the shampoo and other not so very nice things. It made me sad. I did not feel welcome there. Next day I did not want to ride any horses but I was persuaded to ride a pony. On those tiny horses my feet almost touched the ground. So that felt safer than the muscleman horse. We went for a horse ride and everything went well until my horse got thirsty. So the pony went to a ditch and bent down which ment that I fell over its head and found myself sitting in a ditch.
That is it! No more horse riding ever again!