Pearlsacarolsinger
Up in the clouds
Sometimes when the rider is trying to stay on, their legs clamp on to the horse, instead of using balance, which encourages the horse to continue to buck.That's how it felt to me today - like once he started the bucking he was gonna keep on till I came off! I know he had been spooked to start with but I kinda think there was a bit of naughtiness and over reaction there too.
It probably is down to the time of the year really but as a rider you need to be aware of any warnings that he gives you and react accordingly. Tammytoo's advice looks good to me.