Wow, I love how I say one thing and everyone interprets it to mean what they want.
When I'm training a horse, I'm applying a pressure to get a desired response, if the response is anything other than what I'm looking for, I continue the pressure or get stronger with it. If the response is something like a buck or a rear, I don't back off the pressure and let the horse "off the hook" because he did something naughty, I get louder and stronger until I get the CORRECT response instead of stopping the pressure so I can "punish" the buck/rear. That is what I've been trying to describe the whole time.
If a horse is just fresh, I'll likely work on a longe line or in a pen, applying pressures until the horse is calm and obedient, and I have his respect, if he throws in a few bucks in the beginning I don't worry about those unless its blatant disrespect, but everyone here wants to interpret what I'm describing as "teaching the horse to go crazy"
And yes I have plenty of experience with OTTB's too.
One of the other posters stated exactly what I'm talking about, You have to address the cause of the buck/rear, not the symptom, which is the buck/rear its self. Whether the bad behavior is caused by tension, fear, frustration, or just disrespect, you have to address that and the bucking/rearing will stop. If all you do is punish the buck/rear, and don't solve the cause, your horse will find other ways to express his/her problems.