Henry had always been a deep sleeper. But recently, he began to notice a peculiar thing. Every morning, he'd find his trusty tape recorder, which he used for work meetings, filled with bizarre recordings. Curiosity piqued, he decided to play one.

To his astonishment, the voice on the tape was his own, but the words were nothing short of absurd. "I'm the muffin king!" he declared confidently in one recording. In another, he sounded almost panicked, "Why are unicorns chasing me?"

Across the hallway, Sarah, Henry's neighbor, had a similar nightly routine. She would scribble down the most hilarious tidbits she overheard from her own nighttime mumblings. But she didn't need a tape recorder. Her trusty cat, Whiskers, was more than enough.

Every morning, as Sarah reviewed her 'Sleep-Talk Diary', she'd find Whiskers mimicking her nighttime antics. One morning she wrote, "Danced with moonlit zebras," while Whiskers dreamt aloud, "Where's the tuna?"

One fateful night, as the moon shone brightly, a hilarious event unfolded. Henry, in his sleep, began a debate about pickles. Sarah, in her room, responded with an enthusiastic endorsement for dancing flamingos. The walls between their apartments weren't thick enough to contain such comical conversations.

The next morning, as Henry sat puzzled at the breakfast table, staring at a jar of pickles, Sarah knocked on his door, holding her 'Sleep-Talk Diary' with a smirk.

"Seems like we've both got a case of the nighttime nonsensicals," she laughed. Henry joined in the laughter, realizing that while sleep might be a time for rest, it also brought out the most amusing side of them both.

From that day on, they decided to make it a tradition. Every month, they'd host the 'Sleep-Talk Championship', where friends and neighbors would gather to share their funniest sleep-talking tales. And thus, their nightly nonsense became the talk of the town.