Place it near the end of a scene, just after a character insists everything is okay, then follow it with Sad Violin for a slow comic deflation. For a sharper reaction, put Oh My God Wow before it so the surprise lands first and the fake reassurance closes the moment.
About this sound
This six-second clip delivers the line 'you're fine, you're not really fine' in a dry, deadpan voice, the second half quietly undoing the comfort of the first. It lands as awkward, sarcastic reassurance, funny because it says out loud what polite replies usually hide. The contrast makes it feel knowing and a little bleak, like a joke shared between people who have heard that line too often.