So I took my green gelding out today, passing the neighbors stallion. He didnt notice us until we had passed, but on the way back he was waiting. He was very animated running, bucking, nickering, and grunting. My gelding took off in a run, and I had to emergency stop him. I dropped my phone so I got off. My gelding was prancing around so much (VERY UNSUAL OF HIM) and so I decided to walk him away and lunge him if he continued. He is arab/qh cross and his tail was curled all the way up onto his back (never don't this extreme before) and he was full force running without me asking, on the lunge. I got up to the house, and he finally calmed down and listened well.
Did the stallion intimidate and frighten him? That's my thought. I am going to take him down to the stallion tomorrow and let him relax, but if I'm reading this wrong, then it's pointless.... He was ok until the stallion, and then didnt calm down again until we got up the hill to the farm.