György Ligeti - Poème Symphonique For 100 Metronomes

I have always wanted to perform this piece or witness it being performed. It's exactly what is suggested in the title - 100 metronomes are kicked off at once and the piece is over when they are all over. It's long, and the patterns that emerge don't really weave the rhythmic plaids I thought they might - it sounds like rain on a tin roof without the romantic overtones - but the drama and tension of how long that last little guy will keep ticking is rather delicious and even a little profound.