The tuning on that song was pretty nutty. It's recorded with a wah wah in the low position used as a filter. That was the first time we did anything like that. It was Chris's idea; he wanted to get that weird tone that you can't really dial in on an amp. But if you use the wah wah as a filter, it gets an incredibly weird sound. And if you listen to that riff, especially if you've heard the original demos of it, it almost sounds backward.