Humans are funny. Some of us like delineating and imposing order upon the world to the point of getting so much of it that they experience an overwhelming joy in breaking free from the corset again, at least playfully.
As a little boy, I witnessed the equatorial baptism of my mother, which unfolded in the area around the swimming pool of the ship (this looks just like it, prior to the commotion and the mess) that took mom, my sister and myself in four weeks from Durban, South Africa, to Venice, Italy.
The 'baptism' was a traumatising experience as I was unable to discern that the gruesome treatment the Pollywogs (first-time crossers of the equator) were being subjected to was really just for mutual laughs.
The below Spanish event I find a lot easier to take. Most interestingly, however, some of my lasting dislikes (cake fights or cross dressing) clearly have their origin in my line-crossing trauma.
The annual festival of Els Enfarinats (Valencian pronunciation: [eɫz amfaɾiˈnats]) takes place in the town of Ibi in Alicante, Spain on December 28, as part of celebrations related to the Day of the Innocents. In the day long festival, participants known as the Els Enfarinats dress in mock military dress and stage a mock coup d'état. Meanwhile, the Casats i Fadrins, accompanied by a band of street musicians called the Rondalla, known by the name of Sonet, Xirimita and Tabal, tour the city. At 8am, the Els Enfarinats take the city under the slogan "New Justice", and at 9am the Race for Mayor will take place in which it will be decided who is to be Mayor of the Els Enfarinats. Then, the act of L'Aixavegó is carried out in the Plaça de l'Església (Church Square), where the Els Enfarinats reside. Here, it is decided that those who do not pay the fine will go to jail. At midday, a collection called the Arreplegada dels Enfarinats takes place through the streets of the old quarter and of the city centre of Ibi, terminating in the Sant Joaquim Sanctuary. They exercise their authority under a blaze of fireworks, flour bombs and eggs. At five o'clock in the afternoon the authority of Els Enfarinats comes to an end giving way to the celebration of the traditional Dansà.
The tradition is over 200 years old.
See also Castellers - Human Feats, for more Spanish idiosyncrasy.