Owner dropped him off and stated he is on the slow side and to use a crop or spurs. My trainer got on him and had to really use spurs to get him going then he would break consistently on her while trotting and canter. Then I got on him and she gave me her spurs and had my crop. He walked very slow then had to use spurs and the barely trotted then broke, then used crop, he got slower then he just stopped. THEN, as I tried to get him going, he just lowered his head more til it was lower than shoulders with ears pinned back against neck and refused to budge. How close was I to getting tossed over his head into the fence? Was this an obvious sign of aggression and anger? And, how can a "beginner friendly" horse be beginner friendly if he gets into this aggressive stance with a rider? I got owner to pick him up right away and take him back and my trainer was not at all happy about situation. Just want to know if anyone else had this situation on a horse and what happened next? Did you get tossed or is there a way to smooth things over or why do horses do this?