Spot is very high headed and forward. I went on a trail today and I thought he was going to fall apart every time I tried to slow him down. He doesn't rear or buck me, but if I pull back on the reins he sticks his nose completely up and out. He is an ex-barrel racer and a very hot horse anyway, but I'm trying to get this "speedy gonzales" attitude out of him. He hasn't barrel raced in forever. Before that, he was an english horse. He is very inverted and hollow. I ride him in a loose-ring snaffle usually but today I rode him in a french-link D ring and he reacted the same way.
By the way, I found out if I do that "AH AH" (like the scolding noise you make at your kid if it's about to do something wrong) he stops dead in his tracks, no matter what gait you're doing. Haha :)