Oh I got one...not so much the horse, as me... OH i actually have 2 then, I'll do one about me and one about the horse haha
So about 2-3 years ago (I can't remember exactly) I took a morgan that I had been working with to a nice little hunter show. I was super excited because I had worked really hard with this guy, after a good warm-up over some fences I felt really confident. So, we were waiting outside of the arena on deck and I started feeling a little fant, they called my name next to enter the ring, I figured it was just nerves and tried to put it aside. Well, as I was doing my courtesy circle Taco (haha that was the Morgan's name :P) all of a sudden just stopped. And suddenly, I just passed out...off of Taco and landed on the ground full of sand. I woke up from it like 30 seconds later. I had passed out due to dehydration. It SUCKED. Now, my trainers are always pouring water down my throat so it doesn't happen again hahaha. To this day, I swear Taco knew that something was wrong or that something was going to happen, and that is why he just stopped and wouldn't move.
My craziest horse story happened last year. I was at a show and my trainer's friend had seen me ride and wanted me to catch ride this 'amazing' tb x morgan (a thorgan?) Anyway, he was supposedly amazing at the gambler's choice classes (where you pick your own course and you're judged on how well you put the course together and how well you ride it, my personal favorite) Soooo I get on this guy and trot into the ring and getting ready to do my courtesy circle and figuring that I will just take the outside line to start because I didn't know this horse and wanted to get a feel of him. Well, he had other things in mind. All of a sudden the thing TAKES OFF like crazy insane, it got to the point where I didn't even steer him at all, he knew where he wanted to go, and frankly, I don't think it would have mattered if I tried to tell him where I wanted him to go. So it was one of those times where you basically ride the whole thing in 2 point. Anyway, so we get done, he keeps GALLOPING threw the fence and just took off into this field that was next to the ring with me still on him. Well, I then learned that my trainer's friend told him that the horse will stop when he gets tired...wellll he finally got tired and we walked alllll the way back to the ring, he was huffin and puffin, I was huffin and puffin, and we ended up WINNING the class. But there was no way I was riding him back in there for ribbons so I took my saddle off him they threw a cooler on him and I WALKED him into the ring hahaha everyone thought it was the funniest thing ever...I however, did not :P
Sorry for the super long post lol