Dave Grohl has shared reflections on Nirvana's early doubts about 'Smells Like Teen Spirit,' describing it as 'not a hit' at the time, while also revealing his surprise performance opening for AC/DC in St. Louis, which may signal a joint tour. He has also discussed personal stories behind 'Everlong' and his efforts to support Corrosion of Conformity's Reed Mullin during his final days by covering rehab costs.