Corp, I've ridden plenty of bad bucks where I've punished them with work for bucking. If a buck turns mean, they get it. This is a baby buck. They sometimes get excited because they are babies.
There's a difference between "get off my back!" And "woohoo! That was fun!". They will grow out of the latter once they learn to control their excitement.
I've seen Grand Prix jumpers buck in the competition arena due to excitement. It doesn't mean that Grand Prix 6ft Olympic jumper is trained badly and missing holes, and you certainly won't see the rider punish for that type of buck. They remind the horse of their job, drive it forward and take the next jump.
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