Those are some sweet improvisation skills you have, though I imagine the song name, "Highway to Hell", gave some clues on how to frame the story

I'm pretty bad at coming up with something to say on the spot, on the one hand I'm lucky that my coworkers aren't "puffed up like a seagull standing over a dead pigeon" on the other hand I don't quite have that experience for when that person does come in my life

But here's a story anyway.

Background before the story: More than a thousand years ago, after the collapse of the Han Dynasty in China, China split into several smaller kingdoms vying and fighting for supremacy or survival. Eventually the strongest leaders emerged and conquered or consolidated their holdings, transitioning into what's now known as the three kingdoms period of China. Interestingly, Wikipedia has this period ranked as the third most deadliest time of warfare in human history. World war 2 comes first, the Mongol conquests come next; however, the Mongol conquests and the 3 kingdoms period both happened over 100 years of continuous war.

There were many battles of interest in this period, and strategists became famous with their success. Zhuge Liang was the primary adviser for the kingdom of Shu, known to be cunning but cautious, while Sima Yi was, at this point I think, from an aristocratic family and he himself was rising as a general.

Sima Yi had marched out with his army to take a city held by Zhuge Liang, but when he got there, he saw the enemy simply playing a guqin on the top of the walls, attended by a couple servants. Sima Yi, suspecting a trap, withdrew all his forces, while Zhuge Liang continued playing his guqin. He actually didn't have a trap set because his soldiers were elsewhere.

Unfortunately, I think this deception is itself a fiction; the saga itself, a classic of Chinese literature, does embellish on the history a lot. Sima Yi had the last laugh as the ultimate winner of the 3 kingdoms... Wei conquered Shu, Sima Yi usurped the throne of Wei and renamed it Jin, then ended the period with the conquest of the third kingdom Wu.