Place it just after the missed detail appears, so the audience has already seen what the speaker missed. Follow it with a Bruh reaction when the person still does not get it, and save an Oh My God Meme for the moment the realisation finally lands.
About this sound
This 14-second clip delivers the line 'wake up and smell the flowers' as a short spoken nudge, plainly worded and easy to follow. It feels calm and lightly teasing rather than harsh, like a friend pointing out something obvious with a smile. It works as a gentle reality check for someone who has been looking straight past the answer.