Shia LaBeouf’s 'Just Do It' meme originated from a 2015 video titled '#INTRODUCTIONS,' a collaboration between the actor and Central Saint Martins students. In the segment, Shia stands in front of a green screen, aggressively shouting motivational phrases like 'Don't let your dreams be dreams' and 'Yesterday you said tomorrow!' Its intense delivery and the fact it was filmed on a green screen made it perfect for internet remixes, leading to thousands of videos and images where Shia appears in movies, games, and daily life. It is now the ultimate internet symbol for extreme, over-the-top motivation and aggressive encouragement.