We have a mustang that is a big sweetheart I trust her fully when she is out in the pasture. When we saddle her is when I start getting scared and very hesitant in riding her. She gets very alert of her surroundings and it makes me very nervous. When she sees another horse they start their horse chat my question is when they do that how likely are they to throw you off? I love horses and have always wanted them and now that I have them I am scared to death to get on them. Any advice for this big chicken?