My first fall was very soft and fun, actually. I was cantering with a little, nice mare, who was very eager to follow her rider's focus. I was supposed to canter in a cirle with the right lead, which I was learning to, so I yelled to my instructor from time to time, was it the rigth lead. It looked a bit like this -
Me /looking at the instructor/- Hey, is it the right lead?
Instructor - No, it isn't, keep asking her to do a change.
M - Is it now?
I - It isn't..oh wait, she changed it..it is...now it isn't again...WATCH OUT!!!
M - /the horse suddenly stops and spins a bit, I go over her neck and land in the sand on my bum, the horse looking at me in a surprise - hey, where did you go?!/
It turns out that, while I was watching at my instructor and thinking so hard about the right lead, the mare had started following my focus, cantered out of the circle and to my instructor, who was standing by a fence, and, naturally, stopped at the fence, so I came off...