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The clip features American comedian Tim Robinson, best known for the Netflix sketch series I Think You Should Leave, which premiered in 2019. A green screen version of his questioning reaction circulated widely on TikTok, YouTube and editing communities, making it easy to place him over any video. Creators adopted it as a universal response to overconfidence, bad predictions and obvious lies. Its popularity comes from Robinson's deadpan style, which defined the show's cringe comedy, and the line has remained a staple reaction for edits, memes and comment style videos online.
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Tim Robinson delivers the line you sure about that in this short reaction clip, widely used online to question a dubious claim, take or decision.
This is Tim Robinson staring directly at the camera and asking you sure about that with a flat, unconvinced delivery that makes the line feel like a challenge. The recording is just his voice, close and clear, with a short pause before the question lands. It works because the doubt is obvious without shouting or exaggeration, so viewers instantly read it as disbelief. Placed after a confident statement, it undercuts the speaker and turns an ordinary moment into a joke about being caught out, second guessed, or about to be proved wrong in public.
