Now how often does one get to hear Ligeti's "joke" Poème symphonique? It came about recently at the British Library. Or rather, it was performed in the old British Library reading room. 100 metronomes arranged neatly on a platform, lit, and poised to commence. After a short introduction, a small team of museum staff flicked the metronomes and the performance started. It was a cacophony of sound echoed by the reading room's unique acoustic. It's strangely mesmerizing and hypnotic. From time to time, some metronomes came together into unison, and then dissipated. It had an organic quality to it. If one ever wondered, it took about 25 minutes until the last remaining metronome on Largo came to a stop. It was fun!