I had a gelding who would swish his tail across my eyes. I took his tail away when he did it and he quickly learned that he couldn’t swish legitimate flies. He needed a refresher each summer for a few years.
If the bite/escape game is such that the horse is coming in hard and fast with an open mouth when he thinks you’re not looking you can set it up so he gets bitten before he reaches you. This method won’t work on the sneaky touch, nuzzle, lip, nip.
I was holding a two year old for the farrier one day and the horse started the bite/escape game. Obviously the make him think he’s going to die correction was not an option. So I took a bit of baler twine and tied a loop around his nose just above his nostrils, gently snug, and ran the long tail up over his poll and back down to the loop to make a noseband. Then I stood in range and ignored him.
He went to take a swipe at me and when he opened his mouth to bite the baler twine loop “bit” him before he got near me. Well his eyes bugged with astonishment as he pulled his head back fast. He didn’t understand how I could have bitten him so fast without him seeing me coming. So he gave me the side eye, bided his time, and tried again harder and faster. And got “bitten” first! The expression was astonishment and respect that time. :lol: He didn’t play the game with me after that, but still tried it with other people, though in a rather half hearted fashion.