As far as neglecting the presence of others is concerned, the wives of the brāhmaṇas who were performing sacrifices at Vṛndāvana left home as soon as they heard that Kṛṣṇa was nearby. They left their homes without caring for their learned husbands. The husbands began to discuss this amongst themselves: "How wonderful is the attraction for Kṛṣṇa, that it has made these women leave us without any care!" This is the influence of Kṛṣṇa. Anyone who becomes attracted to Kṛṣṇa can be relieved from the bondage of birth and death, which can be compared to the locked-up homes that were neglected by the wives of the brāhmaṇas.
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."
Drooling
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.