Final answer:
Fear is a common unexpected emotion when catching a ball.
Step-by-step explanation:
A common unexpected emotion when catching a ball is fear. When a ball is thrown towards a person, there might be a sudden feeling of fear due to the anticipation of the ball hitting them or the fear of missing the catch and being embarrassed. This fear can be the result of prior experiences or a fear of failure.
Learn more about Emotions while catching a ball