Every night at 10:00 PM, the "Flogsta scream" can be heard in Flogsta, a neighborhood in the western outskirts of the Swedish city of Uppsala.
At precisely this time, students throughout the region scream collectively from windows, balconies and roof tops.
How the Flogsta scream first began is a matter of debate.
Some residents claim that it was initially a stress reliever that students engaged in during exams and then became a daily occurrence.
Others say it started in remembrance of an unidentified student who committed suicide in the 1970s.
Either way, it can’t be helping property values in the neighborhood.