My TW flaps his lip and makes popping sounds when he is
board or irritated. He never did like to be groomed so if I took too long
he would start popping. The funniest thing he does though is
give a nicker/chortle/oh boy sound when I take my feel out of the stirrups and
start to lean forward to get off. His is not the most energetic of horses
and he loves to tell me how glad he is to get done working.
