Place it just before the reveal that the hat was left behind, then follow it with the shocked sound as the owner turns back, and finish with the oh no no no laugh when the chase begins.
このサウンドについて
This short clip is a spoken line, 'Your hat, sir,' lasting about 2.2 seconds, delivered in a calm, courteous tone as if handing something back to its owner. It feels polite and slightly old-fashioned, with a dry, understated humour that makes the simple reminder land as a gentle joke rather than a command.