I felt like writing a story in exactly 50 words, so here it is.
They were in the supermarket and didn't know each other. She yawned. That made him yawn too and she noticed and laughed. They began talking and decided to have coffee in the bar across the street. They began to cross the road. And were both killed instantly by a truck.
It's quite fun to do. No, not get run over by a truck, but write 50-word stories. :)