Sciron
When Theseus came to the coastal city of Megara, he met the semi-divine man, Sciron, who killed innocent travelers by forcing people to wash his feet and then kicking them off a cliff where a giant sea-turtle waited on the rocky shore. When he tried this malevolent trick on Theseus, it did not work so well. Theseus, giving the evildoer a dose of his own medicine, threw Sciron off the cliff instead, to a hungry sea-turtle.