The clip comes from PewDiePie, the Swedish creator Felix Kjellberg, and was noted by fans from his videos around 25 June 2019, when an echo effect was added after he shouted what. Uploaded to soundboards under the name tube simulator, the tiny fragment spread separate from the full video because the echo alone captured the reaction. It has stayed in use as a shorthand for stunned disbelief in edits and chats, especially among viewers who recognise the distinctive trailing repeat from that period of his channel.
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Short echo that follows PewDiePie shouting what in his late June 2019 videos, reused as a stunned reaction and meme sound effect in online edits.
This is the brief reverberating echo heard immediately after PewDiePie shouts what in his videos from around 25 June 2019. The original shout lands hard, then the word trails off with a hollow, roomy repeat that makes the disbelief feel larger than life. It lasts just over two seconds, long enough to register as shock but short enough to stay punchy. Viewers remember it less as dialogue and more as punctuation, a sonic double take that turns a simple reaction into something exaggerated, confused and instantly recognisable to fans familiar with that era of his uploads.
