śrī-śuka uvāca
itthaḿ sa nāga-patnībhir
bhagavān samabhiṣṭutaḥ
mūrcchitaḿ bhagna-śirasaḿ
visasarjāńghri-kuṭṭanaiḥ
sri-sukah uvaca -- Sri Sukadeva Gosvami said; ittham -- in this way; sah -- He, Lord Krishna; naga-patnibhih -- by the wives of Kaliya; bhagavan -- the Supreme Personality of Godhead; samabhishtutah -- fully praised; murcchitam -- who was unconscious; bhagna-sirasam -- his heads crushed; visasarja -- He let go; anghri-kuttanaih -- by the striking of His feet.
According to Srila Visvanatha Cakravarti Thakura, Lord Krishna, upon reaching His decision, immediately jumped down from Kaliya's hoods and stood before the serpent and his wives. We should remember that when Lord Krishna executed these pastimes, He was just a young village boy in Vrindavana.