Source (Furaffinity)
Back in the days before Reunification, a group of four British soldiers stationed in Berlin ignored orders and got themselves onto a train heading towards Russia.
The train carriage had seats down the left and right , so passengers lined the sides facing each other.
A few stops in, these unarmed but clearly British soldiers were alarmed by four fully armed Russian soldiers getting onto the train, who upon spotting the British sat directly opposite them on the train.
The tension built a little, the Russians eyed the silent British, the British eyed the Russian weapons. The rising tension peaked as one of the Russians reached inside his large coat, anyone watching would have been able to see everyone physically tense up.
A moment later, the Russian produced from their coat an unlabeled glass bottle and spoke one of the few words he knew was mutually understood. "Vodka!"
The British did not make it back to their base on time, before their leave ended, but they did get back and they were glad for having taken the risk.
When this story was told to me by one of these soldiers many years later, I could hear what a fond memory it was, that it was a cherished experience above just a weekend off work.