3000 kilometers. 48 hours of intense coding. 20 hours of travel on the train. 4 hours of sleep. The 3 largest cities in Europe: London, Paris & Frankfurt. And all of this over 1 weekend. This is how the last edition of the unusual international “hackathon on the train” called HackTrain could be summed up in a few words. It took place in November 2018. Our two Data Science students from Wroclaw University of Science and Technology, Łukasz Kopociński and Sebastian Muszyński, took part in it and along with their team (Kamil Lelonek, Marcin Milewicz, Michał Załęcki) created a fully-working prototype of a platform to quickly address passengers feedback shared on Twitter. They won the second place with their solution!