I miss all the good stuff. There were a series of flash mobs in the city center this week. The first one posted took place at T-Centralen which I see, at least, ten times a week. The second in the famous NK Department Store located close by. Unfortunately, I missed it all. Though from what I read, flash mobs are a rather common occurrence here in Stockholm.
A flash mob is defined as a large group of people who assemble suddenly in a public place, perform an unusual action for a brief time, then quickly disperse.