A 28-year-old man from Oberhausen, North Rhine-Westphalia was riding a Eurobahn train between Düsseldorf and Dortmund on Sunday night at about 10pm.
A group of young people between the ages of 18 and 24 were also riding the train and started playing music and singing.
But the visibly drunken 28-year-old apparently did not take a liking to their mobile karaoke show.
“Apparently because he was perturbed by the group of young men and women listening to their music and singing, the 28-year-old man staggered towards the group,” federal police wrote in a report on Monday.
Witnesses told police that the man pulled a pistol out of his waistband and loaded the gun. He then sat down again, but when the train neared a station, he jumped up and threatened the group of youths directly with his weapon drawn.
“You always meet twice in a lifetime, next time I'll blow you all away,” he then reportedly shouted.
At some point train passengers alerted police to what was happening and when the train stopped at Dortmund central station, officers were able to board, finding the man still standing with his weapon drawn.
The man denied multiple requests by officers to drop his weapon, so police overpowered and arrested him.
They then discovered that the weapon was actually not a “real gun”, but a loaded airsoft handgun, for which it's required to have a permit to purchase.
The man was already known to police for other violent incidents, and they are now investigating him for making threats and causing dangerous bodily harm.