Give him a light tap with the whip and urge him on.
Smack him with the whip of course! You're only halfway done, after all!
Get off and take a break.
Shove an apple in front of his nose to keep his mind off the fox.
You pat his neck and tap him with your heels just ever so lightly.
You mutter, "holy 'shoot'" under your breath and tap your heels to your horse's sides. (And I don't mean shoot, I mean the REAL shoot.)
Correct him and give him a decent smack on the rump.
You tap him and correct him.
You don't do anything, but try it again.
Smack him, of course! Ahem – no bucking on MY watch!
Say "bad boy!" but nothing else.
Smack him and get on with the ride.
Do nothing but laugh and ruffle his mane.
Turn his head away and give him a little smack.
Bite him back!