Place it at the end of a failed stealth attempt, after Enemy Spotted warns that trouble is coming and before Roblox Oof underlines the defeat. That order builds the threat, delivers the death, then lets the second reaction finish the joke for the viewer.
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This is a short, roughly two-second clip of a Half-Life scientist letting out a panicked dying groan as he is taken down. The strained, desperate voice lands as darkly funny rather than gruesome, turning a sudden defeat into a punchline. Taken from the original Half-Life game, it captures the helpless scientists who became one of its most recognisable sounds.