The King, the Guard, and the Woman

Question: Once there lived a king in a very secluded kingdom. He did not let anybody leave the kingdom or let any foreigners in. There was only one bridge that led outside the kingdom. The king assigned a knight a job to watch and guard the bridge and not let anyone leave or get inside without the proper papers. Every hour he would take a five minute break inside his little hut on the side of the bridge. The bridge takes a maximun of eight minutes to pass. A woman needed to leave desperately to visit her family, but the king wouldn't let her. She came up with a plan and was able to leave the kingdom safely without hurting the guard. She did not leave at night. How did she leave?

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