Dave Grohl has been in the rock business for more than 20 years now, and during that time, he's seen many so-called "musical movements" come and go. Thus, he's particularly amused by the current generation of emo-punk acts bounding across stages worldwide. After all, he's been doing this for so long that he remembers emo the first time it came around.

"I have a funny relationship with emo," he said. "I'm from Washington, D.C., and in the mid-'80s, the hardcore scene changed from what it was — Bad Brains and Minor Threat and the Dead Kennedys and MDC — to a bunch of new bands like Rites of Spring and Embrace, [both of] which Ian MacKaye was the singer for. Everyone started labeling it 'emo-core.' So I went to Rites of Spring's first show, and it was a revelation. I'd never heard anything like it, and it was a really emotional experience. But in D.C., we all hated that 'emo-core' tag."