According to The Pulse Of Radio, FOO FIGHTERS frontman and former NIRVANA drummer Dave Grohl told the Washington Post in a new interview that he was "terrified" of watching the new documentary on late NIRVANA founder Kurt Cobain, "Montage Of Heck", when he and his wife stumbled upon it on HBO recently. Grohl explained, "All the footage of him as a child, I think that might make me sad, and then the dark stuff at the end I think would bum me out."

Grohl added that he watched for 10 minutes, then rolled over and went to sleep — since he had to be up at six the next morning to take the kids to school.

Although Grohl was interviewed for the film, his footage was not used. Director Brett Morgen told The Pulse Of Radio how he's explained Grohl's absence to fans. "What I've done and started doing is turning on people and going, 'Well, what is it you want him to say? Is there something you feel we're missing about Kurt?'" he said. "And there never is an answer. No, we feel like we've just got to know Kurt better than we ever have, so why in the world do you want Dave? 'Because he's famous.' And that's exactly why he shouldn't be in the movie."

"Montage Of Heck" marks the first time any authorized film about the life of Cobain has been made. Morgen, who serves as writer/director/producer on the doc, had full access to Cobain's personal archives and has dug through countless amounts of home movies, recordings, pages of writing and much more, all of which has never been seen by the public.

"Montage Of Heck" premiered on HBO on May 4.