Horses are not very bright. Horses are creatures who's primary means of defense is flight. They have blind spots immediately in front, and behind them. They have a cone of blindness about six feet in front and behind. Stay out of this area when possible.
Horses have no conscience.
There is much dissent about this. In spite of what many would like to believe, your patient or pet may run over you and it will not feel a bit bad unless it hurts itself in the process. Horses respond to all sorts of stimuli. Windy days are as vitalizing to horses as they are to humans. One of the biggest causes of injury is macho, or macha activity.