This awesome piece of canvas art is a still taken from the movie Star Wars: Revenge of the Sith. This was the movie where Anakin fully turned to the dark side after being defeated by his Master.
This movie comprises of a scene where Obi Wan battles his padawan. The Duel on Mustafar was a confrontation where the recently apprenticed Sith Lord Darth Vader, formerly Anakin Skywalker, fought his former best friend, and Jedi Master, Obi-Wan Kenobi, on the planet Mustafar in the Outer Rim. The duel ended with Anakin near death, but he was found by Darth Sidious. The Sith Lord left Mustafar with his gravely injured apprentice, who would rise again as the black-armored Imperial enforcer Darth Vader.