Because of the winds of the sea, sometimes the sand would form dunes. Such sand dunes are called cataka parvata. Instead of seeing these sand dunes simply as hills of sand, the Lord would take them to be Govardhana Hill. Sometimes He would run toward these dunes at high speed, crying very loudly, expressing the state of mind exhibited by Radharani. Thus Caitanya Mahaprabhu was absorbed in thoughts of Krsna and His pastimes. His state of mind brought Him the atmosphere of Vrndavana and Govardhana Hill, and thus He enjoyed the transcendental bliss of separation and meeting.