Screaming, crying, freezing, or running away from the feared stimuli. A phobic person will typically try to avoid the feared stimuli – for example, a person with aerophobia might stay away from airports.
Cognitive
Most people with phobias recognise that their fear is irrational and disproportionate. However, this recognition does little to reduce the fear the phobic person feels.
Emotional
It is natural to feel some fear in response to potential danger. But people with phobias experience extreme fear that is uncontrollable and disproportionate to the situation.