Well, it happened. I fell off :( And of course it was when we were cantering, I haven't QUITE mastered that yet. The horse I was riding cut a corner and I wasn't expecting it because I was trying to make her go all the way into the corner, so she turned suddenly...and I didn't. It was so fast I didn't even know what was happening, one second I was riding her fine and the next she had disappeared!
But the good news is I got back on and after a few laps we started jumping for my first time! It's sooooo much fun!