I'm a new rider and have been told that canter is the gait where most newbies have their first fall.
I didn't make it that far. My favourite school horse, who usually gives no fucks about anything going on around him, freaked out when another horse knocked a cross pole down and I went flying off the side of him.
I am rather overweight, he is nearly 17hh and I landed flat on my back. Not a great combination really. But I was fine. I had a wet arse and slight whiplash which disappeared after a few days but otherwise fine.
I sat up, was advised by my instructor not to try and exhale for a minute, got up and planted my bruised backside back on the very sheepish looking horse who had stopped the second he realised that I was no longer on his back and was standing quietly, looking embarrassed.
Its not very often that good schools have serious accidents. The arenas are generally sand which makes for a soft landing and the horses of a calm disposition.
At the school where I'm learning the horses and ponies are all either current or ex comp and so can be a bit firey but still for all their quirks they are generally even tempered and well schooled.
They wouldn't teach on horses who were dangerous. I mean it's a risk sport but they aren't going to use horses who are a liability.