In Pirates of the Caribbean: At World's End, after Calypso is released and grows into a giant, Barbossa asks her to destroy the East India Trading Company who he tells her that they believe to be her masters (as Calypso is the Sea and Beckett believed himself Master of the Sea).
After a short moment of silence Calypso starts saying something, almost angry, before becoming a mass of crabs and returning to the sea. It's then when the winds pick up and a maelstrom forms which given the timing we can assume was her doing.
What was Calypso saying before she became the crabs?