Now this is awesome. This group, going by the name Hedonist International, organizes flash mob-style events, reclaiming urban spaces. Well, actually, it’s pretty well organized for a flash mob. Anyway, this video mashes up two events: A mobile rave squad in the underground shopping mall under Potsdamer Platz, and a spontaneous rave in Berlin’s famous trademark TV Tower. Rumor has it that for the TV Tower rave, they actually built a disposable modular sound system which they chained to a massive steel handrail on the viewing platform about 204 meters about ground level – and so managed to keep dancing up there for more than two hours before it got shut down. What a hack!