Place it at the very end of a short edit as the final reply, after the setup has finished. Follow a confused reaction with the Anime Wow Sound Button first, then let this clip close the scene with nothing after it.
O tym dźwięku
A short one-second clip of a woman clearly saying the single word 'lemon' in a plain, matter-of-fact voice. It feels oddly funny and deadpan, because such a random, specific word lands with total seriousness. That contrast makes it sound like an intentional answer even when it makes no sense at all in context.