When a devotee laughs very loudly like a madman, it is done out of an extraordinary agitation of ecstatic love within the heart. Such mad laughing is an expression of the condition of the heart, which is technically called atta-hasa. When a devotee becomes affected with this mental condition, his love is expressed through the lips. The laughing sounds, coming one after another, are compared to flowers falling from the creeper of devotion which grows within the heart of the devotee. In the Caitanya-caritamrta devotional service to the Lord is also compared to a creeper which rises up to the lotus feet of Krsna in Goloka Vrndavana.