On 26 December 2004 an English girl, Tilly Smith, was walking on a beach with her family in Thailand. When they went down to the sea, Tilly saw that something was wrong. The water was all frothy, said Tilly.'It was bubbling.' Tilly remembered a short film her class had seen at school about a massive wave called a tsunami. In the film the sea became frothy just before the tsunami struck. Tilly knew that a tsunami was coming She began to scream at everyone to get away from the beach. Minutes later, the Great Indian Ocean tsunami struck the coast.