Horrified , Luke refuses , and throws himself into a deep reactor chasm .
Vader then reveals that he is Luke 's father and offers him the chance to turn to the dark side of the Force , and rule the galaxy at his side .
Horrified , Luke refuses , and throws himself into a deep reactor chasm .
Vader then reveals that he is Luke 's father and offers him the chance to turn to the dark side of the Force , and rule the galaxy at his side .