The Betrayal at Mustafar

Padme Amidala went to the volcanic planet of Mustafar in her Naboo star skiff. She went there to talk to her husband Anakin Skywalker about his dark evil deeds at the Jedi Temple. Anakin's former Jedi Master Obi-Wan Kenobi had stowed away on Padme's ship. When Obi-Wan got out, Anakin thought that Padme had betrayed him. When Padme tried to explain, Anakin choked her with the Force and she fainted. Obi-Wan and Anakin fought. Obi-Wan got the high ground and cut off Anakin's legs and his left arm and left him there to die. The Emperor then camealong and rescued Anakin and turned him into Darth Vader.