The bible says he has giving us the spirit of life and sound mind! when you doubt yourself in the spirit of Almighty God in the name of Christ Jesus, things like that may happen to you!! I am sure he saw the decoration inside the shrine and he got afraid a bit....next time , ask God to give you courage and totally defeat the spirit of fear in your life. without fear you can defeat such idols in the name of Christ Jesus.
. Just like Disciple Peter trying to walk on water in the manner of his Lord, he faced a momentary distraction and began to sink. He (Peter) later became the Greatest Apostle. Give this man time, if he was really CALLED to embark on that crusade, he will rise later.