“Then he said unto them, Go your way, eat the fat, and drink the sweet, and send portions unto them for whom nothing is prepared: for this day is holy unto our Lord: neither be ye sorry; for the joy of the LORD is your strength.” Neh. 8:10
Some Christians are taught that it is unholy or carnal or at least immature to express emotion in church. However, that is the ingredients to a weak church. Consider also that Romans 14:17 teaches us that the kingdom of God is righteousness, peace and JOY in the Holy Ghost. So I guess I can say if the Spirit of God is truly present in our meetings, then it is very normal for joy to be expressed. People that rejoice in Christ are a strong people.