Several weeks ago I was riding a perfectly sound pony with shoes and everything in a perfectly maintained ring.
We were cantering (not very fast) around a not very tight corner and suddenly he tripped over his feet and fell on his face. I fell and got kicked and banged up. The horse just got back up and was perfectly fine (thank goodness). It had never happened before.
I've been riding since then, but whenever my instructor wants me to canter a circle I get really nervous. Especially when I start seeing the horses' body bend in the turns. I'm afraid he... or she is just going to tip over. Consequentially I always slow down drastically in the turns and eventually break. It's not good for courses either.
These horses NEVER tripped (seriously anyway) before... so I shouldn't be scared, right? Why shouldn't I fear cantering a large circle (20 or 50 meter)... what are some things to take into consideration?