The Escalade is a traditional celebration in the Geneva area and it has roots 4 centuries ago in one of the most conflictual periods in the history of the city.
http://www.geneva.info/events/escalade/
This event is still extremely present in the city and it’s something that the Geneva people are quite attached to for its historical meaning.
Part of the tradition is to smash a chocolate cauldron, decorated with the coat of arms of the city and we had our Swiss on duty, Philip doing the honours 🙂