“Ah, the volcano Hecla - immortalized by William Blake as a tomb strong enough to contain Winter itself, and referred to throughout Europe as the "Gateway To Hell." Lovely this time of year, one imagines. Icelandic composer Jón Leifs got to witness one of its eruptions, and in response composed what's considered the loudest piece of classical music of all time. The requirements for a performance of Hekla include "four sets of rocks hit with hammers, steel plates, anvils, sirens, cannons, metal chains, choir, a large orchestra, and organ." Some performances have included rifle fire. It's a slow build, so put it on the big speakers, turn it up, and let it do its thing.”