Place this clip at the exact moment of the reveal in your edit, after a normal introduction scene, then follow it with the Bruh Meme Sound Button as the on-screen reaction from everyone else in the frame.
关于此声音
This 2.6-second clip is a woman's voice delivering the blunt line 'I'm your sister' as a sudden family reveal. It lands as funny and awkwardly surprising, the kind of deadpan twist that makes a normal conversation instantly uncomfortable. It comes from the comedy film Joe Dirt.