The line comes from the 2005 film Serenity, the continuation of the cancelled series Firefly, where pilot Hoban Wash Washburne, played by Alan Tudyk, repeats it as a calming mantra while flying through a Reaver fleet. The moment became one of the most quoted and emotionally charged scenes for fans because of what happens immediately after he succeeds. Clips and quotes spread through fan forums, conventions and early meme culture, and the phrase now signals brave, focused calm before disaster in edits far beyond science fiction.