Thanks everyone. The idea of riding while on the lunge line does not sound at all secure to me. There is a trust issue at hand, not sure who the trust issue is directed to, but the thought of my horse being controlled by someone other than me, while I am on his back, makes my stomach flip flop.
Could I use a cirgincle (spelling) and lunge him to teach him to raise his head and break at the poll? Or is that a training no-no.