Looks like you had fun. No one knows your horse better then you, and im sure you only did when you knew she was capable of. Congrats for having such a good horse. She definitely knows that you wouldnt hurt her. Its so lovely to see such a trust relationship between a person and horse
Her ears aren't pinned, she's watching and listening. I'd watch too if someone propelled themselves off my back, Allie.... What a good girl! Pretty sure it cannot hurt a 1,200 pound horse to have a human who weighs 100 pounds soaking wet jump off there back :)
Think about the heavy riders riding 14hh horses un-able to balance properly or post, that's ouch.
I wouldn't do that, simply because I'm clumsy and would probably break an ankle, but if you have the coordination to risk it I'm not going to rain on your parade. Your horsey is clearly fine with the situation.