This is a video on YouTube. It is a new phenomena on Internet. It is named The Harlem Shake Compilation. FreshFailsblog is the user that has uploaded the video.
Here is another variant with only girls.
If you happen to go past Vienna, why not visit the nude men exhibition in Vienna. Nude men for a change. The men show everything of the package. However, not a erectic one, but not less fascinating. The exhibition is, according to DN.se article, supposed to made nudity less dramatic. Oh I wish Stockholm also could have a nudity exhibition about beautiful men.