The young man's Hollywood-style escapade took place on Thursday evening shortly after 11 pm, the Westdeutsche Allgemeine Zeitung (WAZ) reports.
The commuter train slowly started headed out of the central station in Hamm towards Dortmund when the young man realized that his bag was still inside.
Of the many courses of action he could have chosen, he decided that jumping onto the back of the high-speed vehicle was his best bet.
Luckily for the rash Rambo from the Ruhr, the driver of a train on the adjacent platform noticed him standing on the coupling and immediately informed his colleague.
The train driver activated the emergency brake and the train came to a stop around 150 metres from the platform.
The driver of the other train managed to grab the man from the coupling and safely bring him into the train.
When the police turned up the young man explained that he was only trying to stay with his luggage, and that he'd wanted to go inside but the doors had closed too quickly.
Police have now opened a criminal inquiry into a “dangerous intrusion into rail traffic.” They also discouraged other people from acting in the same way,calling the behaviour "life-threatening.”
Commuters in the western German town were also made to pay for the act of derring-do. Ten trains were delayed for a total of 171 minutes.