Place it at the end of a failed plan or risky choice, after Enemy Spotted sets up the trouble and before Ah Shit Here We Go Again closes the scene.
關於此聲音
This is a very brief spoken line lasting just over a tenth of a second, built around the words I regret nothing. It lands as blunt and unapologetic, turning a serious admission into a dark joke. The line comes from Postal 1, where it works as a quick, stubborn answer to any accusation or second thought.