This day I love Moscow. Usually it's not too bright, but on the day of Dreamflash...
The Dreamflash is a flashmob, organized by Livejournal community ru_dreamflash (founded by LJ user antufev 4 years ago). This flashmob usually takes place in the very beginning of April, and is all about soap bubbles. Also it is one of the most popular unofficial events in Moscow, and probably in Russia.
This year Dreamflash happened on April, 12. In Russia it is also Сosmonautics Day (remember Gagarin, first human in space? ;)
This year we had more then 5 000 people participating or just visiting this flashmob.