This might sound silly, but as soon as he starts that mess yoke him and pin him on his back and set strattle of him. Holding his head down and scolding him at the same time. hold him down til he calms down and quits squirming. Let him up slowly and repeat when necessary.
I ain't ever done it, but if you really want to get serious, you could bite him on the ear when he's pinned down too. Ive heard of folks thats actually done that. LOL.
Thx i just might try that,i dont know about the biting him part tho...although i bit a horse on the ear when he turned around and nipped me while i was saddling him,i think it kinda suprised him lol