The line comes from Shia LaBeouf's 2015 motivational performance recorded for a student art project in front of a green screen. The full speech, best known for its repeated just do it chant, was quickly isolated, remixed and placed over other videos because the format was easy to reuse. Clips spread across YouTube and social media that year and never really left meme culture, with this waiting for fragment kept as a shorter, punchier alternative to the longer rant for reaction edits.