Place it at the turn in a villain edit, after the setup and before the reveal, then follow it with a Darth Vader no for the reaction and an it was at this moment he knew for the fallout.
關於此聲音
This 3-second voice clip is the Joker speaking a threatening line about putting a smile on someone's face in a low, deliberate voice. The slow delivery makes an ordinary cheerful image feel unsettling and dangerous, as if a joke is about to turn violent. Heath Ledger delivers it as the Joker in the 2008 film The Dark Knight, in a confrontation scene.