Once upon a time, when Śrīla Caitanya Maṭha was just constructed and established and deity installation was done. Only the deity temple was there and the Avidya Haran Nattya Mandir was almost complete. All around open field and green bushes. But of course harikathā-kīrtana was a daily (nitya) sevā of Śrī Śrī Rādhā-Govinda Gaura Hari there on behalf of Śrīla Prabhupāda. One day evening time (after noon but almost approaching evening) while harikatha-kīrtan by Śrīla Prabhupāda was going on, suddenly a big gokhro snake entered the Avidya Haran Nattya Mandir through the middle passage of both the group of mātājis and pitājis to come in front of Śrīla Prabhupāda’s vyāsāsana to sit there in coiled form to hear harikathā. All the audience were very much afraid of the fact, but Śrīla Prabhupāda assured them with full indication of abhayamudrā (by some sort of finger indication of fearlessness). After the harikathā was over, then the snake also went away without any disturbance.
Śrīla Śyām Dās Bābā