Credit: Neilson Barnard/Getty Images

Montage of Heck, the critically acclaimed documentary about Kurt Cobain’s life and death came out back in April, but the late musician’s former bandmate Dave Grohl didn’t watch it until recently—and he couldn’t even watch the whole thing, he admitted to the Washington Post.

The former Nirvana drummer told the publication he was “terrified” to come across Montage of Heck on TV and only managed to watch about 10 minutes of the film. “All the footage of him as a child, I think that might make me sad,” Grohl said, “and then the dark stuff at the end I think would bum me out.”

Director Brett Morgen had unparalleled access to Cobain’s old notes, recordings, and art for the film, which EW‘s Chris Nashawaty called “devastatingly intimate.” Read the review here, and read the Washington Post’s full story on Grohl here.