The vase painting shows the moment when Heracles has returned to King Eurystheus who is completely terrified of the Erymanthian Boar and attempts to hide himself. Eurystheus begs Heracles to get rid of the fierce beast, and Heracles does so by casting the boar into the sea.
You can also find more myths and legends for the week of November 4-10 here. For more information and links to the actual javascript code, see the Myths & Legends Widget Reference Page.