How many more years will we be able to see a band as heavy, psychedelic and powerful as Soundgarden headline a major music festival? If the days of this kind of rock music still having enough popularity and relevance are waning, I’m glad I got a chance to see it go down on Friday, was a huge, turbo-charged shot of adrenaline to watch a band bring that kind of voltage to the stage (without synthesizers or turntables).