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Are you sure? Omni-Man

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Omni-Man asks Are you sure in this short voice line from Invincible, used as a tense reaction sound for doubt, threats and second guessing edits.

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About this sound

Omni-Man asks Are you sure in this short voice line from Invincible, used as a tense reaction sound for doubt, threats and second guessing edits.

This is Omni-Man's calm but menacing delivery of the line Are you sure, lifted as a short voice clip from Invincible. He does not shout, which makes it hit harder, the question sounding less like doubt and more like a final warning before violence. The pause and low tone turn a simple check into pressure, inviting the other person to back down. Viewers instantly read it as dominance and danger, so even out of context the clip carries tension, disbelief and the sense that someone has just made a very bad decision.

Pro tip

Place it right before the moment someone commits to a bad idea, then cut to silence or the consequence on the beat after sure. Keep Omni-Man's low volume intact, do not bass boost it, and avoid music underneath so the threat stays clear.

How people use it

Reacting when a friend confidently picks the wrong answer
Warning a character before they challenge someone much stronger
Captioning gaming clips where a player rushes a boss
Punching up doubt moments in edits and meme compilations

More information

Omni-Man, also known as Nolan Grayson, is the Viltrumite hero voiced by J.K. Simmons in Invincible, the animated series that premiered in 2021 and adapts Robert Kirkman's comic. His confrontations with his son Mark became a rich source of reaction clips, and this questioning line circulated on soundboards and short form video as a standalone warning. It stays popular because the delivery works without the scene, letting editors borrow the character's authority and menace for everyday arguments, gaming mistakes and overconfident claims online.

FAQ

What is the Are You Sure Omni-Man sound?

It is a 2.7 second voice clip of Omni-Man asking Are you sure in Invincible. The calm, low delivery sounds more like a warning than a question, which is why creators use it for doubt, threats and overconfident moments.

Who voices Omni-Man in Invincible?

Omni-Man, whose real name is Nolan Grayson, is voiced by J.K. Simmons in the animated Invincible series. Simmons plays him as controlled and intimidating, and that restrained performance is a big reason short lines like this work so well as reaction audio.

How do people use this sound in edits?

Creators drop it just before a bad decision, a failed challenge or a confident mistake, letting the line create a beat of tension. It works best with a reaction shot, a freeze frame or a sudden cut to the consequence afterward.