Dang, it's possible that I won't be riding this week =/
My boss e mailed me and told me that no one is allowed to ride Mr P until further notice. He ended up rearing while a girl (a more experienced rider) was trying to mount, and then did it again while they were riding around the arena. According to my boss Mr P is a horse who wouldn't even think about kicking or rearing, let alone under saddle (but I know from first experience that even though you say that it doesn't mean it won't happen)
When Boss gets back into town she is going to look at Mr P. He has been acting funny (with the whole bucking in the stall situation). Hope everything is okay with him, he can be such a sweet hear.