Well, no... but I once tried to ride a horse while wearing a Santa suit. Take this as a warning: never try it.
I was asked to be Santa at a street Christmas party and when I got there they asked me to ride a horse. Well, a mare, if you want to be picky about it. She was a beautiful thing, perfectly groomed, decked out with tinsel and tiny bells and anybody would want to ride her.
Of course, it would have helped if I'd ever been on a horse before but the kiddies were waiting.
As I approached I saw that her eyes were flaring and she seemed to be trying to pull away from me, but I thought that might have been a horsey thing to do, so I clambered aboard. That's when I discovered how an astronaut feels when the count gets down to zero. As soon as I was on her back she launched into space.
I can't say I actually dismounted. The third time she put all four feet on the ground, I dived. She went pig-rooting around the yard for a while then saw me on the ground and came back to finish me off. Somebody pulled me clear and I did my Santa duty on foot.
Everybody in the yard was panicking except for my daughter-in-law who kept snapping away with her camera right through the action. Unfortunately she cut the heads off all the photographs because we were bucking out of camera range. (I say "we" because that horse and I were a single organism for the few seconds I was in the saddle.) A pity, really, because if the horse had finished what it set out to do, those photographs would have been handy at my inquest.