So are you sayin that once you loosin the contact with the bit that he begins to act up? I think you just got to be firm and adjust, I do not know much about English. Just be patient and make him realize that just because there isn't contact on the bit 100% time, doesn't mean he can act up and rush.
I love my horse. She is the wind beneath my wings.
John 3:16 (READ THIS PLEASE!)