At a show last weekend, he behaved exceptionally well for the pleasure classes. He listened, never offered to do anything bad, and was just a great pony during those classes. We actually won 4 out of 7 of them!
Then it came time for the 'Fun & Games' at the end of the day.
We went in to do our run for barrels. He felt a little excited, but overall I wasn't nervous because he had been so good before.
So first barrel; perfect, but right between the 1st and 2nd barrels, he started bucking like a rodeo horse. He bucked about twice, maybe 3 times, but I rode it out, turned his head around the second barrel, and finished our run. It was SCARY because I thought I was a goner, but I held him back for the rest of the run because I didn't trust him at that moment.
Then we had poles. We knocked a pole, but other than that he was pretty good, excited a little, though.
Then it came time for speed dash (the one barrel in the arena.)
I felt kind of confident, so I let him go full out (which he LOVES).
Got around the barrel and were on our way home, he starts bucking like a rodeo horse again. It felt the same as the first time, but we were going faster so it was scarier/harder to ride out. I didn't fall off, and I 1-rein stopped him and trotted him accross the finish line, but I was really caught off guard.
So I proceeded to the next game. Keyhole. He did is so well, we got 2nd. He was perfect. No buck, just doing his job. Same with Egg & Spoon.. All the rest of the games he was great! But just those 2 classes, and it just happens to be the only 2 that include barrels.
What is it about barrels that he always bucks at? Whenever we practice at home, he's fine. The reason I don't think it's a saddle/pain/injury problem is because he was fine for all the other events, plus my dad and I checked him all over for swelling, or anything abnormal.
Why would he be doing this? It's so weird!