Like I said, we have determined this is behaviorial. It's been months of doing the teeth, saddles, pain, riding in different locations, etc. etc. etc. It's either fear, fun or disrespect -- anyway something in his head we have to get him over. He only does it when he is outside of his paddock / ring. Personally, I think it's fear and lack of security. He was definitely asked to do too much when he first arrived at his new home, and then again about a month ago. Both times, IMO, his reaction was from fear and frustration / confusion. The last time, I think it's a carryover from his previous bad experiences. That said, I think my friend is going to really tone down how much she asks of him, esp. since I keep reminding her we don't know what he knows or has experienced in the past.
But, I digress -- what I'm really interested in here is the proper use of the bridle.
Thank you IRide - that's basically what I had in mind -- keeping contact. By keeping his head up, I meant actually, not allowing him to get it down in preparation for a good buck, but not trying to do a high head set. I just want control. I always ride in a snaffle or french link now, so I think I'll be OK with this then.
Fox Hollow -- I like your suggestions about trying a noseband, but not sure what you mean. We have a hackamore available, but I think it might be too severe for him. Do you mean a bosal? Or do you mean adding a flash / noseband to a bitted bridle? We won't go back to a bit, at least this year anyway. Oh, and I plan on trying him bareback (maybe with a surcingle to hold on to!) so this would totally eliminate any possible saddle issues. My friend won't ride bareback.