The 'I Thought You Were Stronger' meme originates from the Amazon Prime animated series Invincible, specifically during a brutal confrontation between the protagonist Mark Grayson and the dimension-hopping villain Angstrom Levy. After being pushed to his absolute breaking point, Mark delivers a series of fatal blows, only to realize in the aftermath that he had overestimated his opponent's durability. The scene depicts a bloodied Mark looking at his hands in shock and regret. On the internet, the template is used to mock things that fail unexpectedly or to highlight the disparity between expectations and reality, often applied to tech failures, sports upsets, or personal lapses in discipline.