It happened in Germany, when a teenage girl forgot to mark her birthday invitation as private on Facebook and was forced to flee the venue of the party as more than 1,500 guests showed up and around 100 police officers, some on horses, were needed to keep the crowd under control.
The girl was celebrating her 16th birthday.
According to Mirko Streiber, a police spokesman, eleven people were temporarily detained, one police officer was injured, some girls cut their feet on broken glass and firefighters had to extinguish two small fires at the venue in Hamburg.
He added, that the girl identified as Thessa, went into hiding, but "nonetheless the party was a hit."
The teenager had originally wanted to invite some of her friends to her home for the birthday celebrations and had thus posted her invitation on Facebook, but mistakenly she published it so that everyone on Facebook could view it.
According to the German weekly, Bild am Sonntag, the invitation quickly went viral, and about 15,000 people confirmed online they would come to the party, most of them didn't even know the girl.
The girls parents then forced her to cancel the party, informed the local police and hired a private security service to safeguard their house. The police then made public announcements that the party had been cancelled, but nevertheless, some 1,500 people still turned up on the street in front of Thessa's home.
Streiber, was quoted by the Associated Press as saying, "We had cordoned off the house, some 100 police were on the ground, four of them on horses – but that did not keep the kids from celebrating."Indeed the girl had a remarkable 16th birthday celebration.