Esa-Pekka Salonen: “The power of the installation is that it places no demands on you. If you hate it, you leave after 30 seconds. If you like it, you stay for two hours, three hours. For me personally, the best experience was to see two old ladies in their 80s banging the hell out of the bass drum, trying to hit the off-beats and shrieking with joy like little girls.”