Because of advancement in Krsna consciousness, he [Prahlada Maharaja] sometimes cried, sometimes laughed, sometimes expressed jubilation, and sometimes sang loudly. Sometimes, upon seeing the Supreme Personality of Godhead, Prahlada Maharaja would loudly call in full anxiety. He sometimes lost his shyness in jubilation and began dancing in ecstasy, and sometimes, being fully absorbed in thoughts of Krsna, he felt oneness and imitated the pastimes of the Lord. Sometimes, feeling the touch of the Lord's lotus hands, he became spiritually jubilant and remained silent, his hairs standing on end and tears gliding down from his half-closed eyes because of his love for the Lord.
[Srila Prabhupada's translation of Srimad-Bhagavatam 7.4.39–41]