In the Padyāvalī there is a statement by some devotees: "We shall not care for any outsiders. If they should deride us, we shall still not care for them. We shall simply enjoy the transcendental mellow of chanting Hare Kṛṣṇa, and thus we shall roll on the ground and dance ecstatically. In this way we shall eternally enjoy transcendental bliss."
As an example of the running down of saliva from the mouth, it is stated that sometimes when Nārada Muni was chanting the Hare Kṛṣṇa mantra, he remained stunned for a while, and saliva oozed from his mouth.
Laughing like a Madman
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 aṭṭa-hāsa. 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-caritāmṛta devotional service to the Lord is also compared to a creeper which rises up to the lotus feet of Kṛṣṇa in Goloka Vṛndāvana.
Wheeling of the Head
One gopī told her friend: "It appears that Lord Kṛṣṇa, the enemy of the demon Agha, has released from His mouth a whirlwind which is acting on your head and is gradually proceeding to do the same to the other lotus-eyed gopīs."