A single booming note from a huge drum shakes the steel skeleton of the abandoned warehouse and an expectant silence pushes hard against the darkness. When the drum speak again it is not alone. A second timpani tuned just flat of the first follows rhythmically.

Dual blows followed by a pause repeat without adornment. The massed bodies start to rock as body rhythms adjust subtly to the demanding beat. A thousand hearts beating in time, beating in the heavy lightless night joining stranger to stranger. The drums continue building like an ocean wave, it's power growing steadfastly until the moment before the wave is ready to crest and roar downwards with an exhilarating rush of energy.

And the drums fell silent.

And for a brief moment a thousand hearts stopped beating.