There had been bands who veered between quietness and loudness. There had been bands who explored the dynamic possibilities of space. But Slint's second album, Spiderland, explored both paths in a new way. Its disconsolate air was entrancing and disturbing: Spiderland was the perfect title for an album so itchy. It was rock music as it had not been heard before, and a new term was given to the style it birthed: post-rock.