The mixtape known as "Montage of Heck" is the centerpiece - the namesake - of the documentary (coming to the public soon) about Kurt Cobain. Inside this mixtape is a cacoffiny of oddities. Everything from KISS to The Hobbit, the Star Wars audiobook to Queensrÿche. It's not your average mixtape. The same is true of the documentary. Created using home movies, tapes, concert footage, and other unseen bits of footage and audio, the creators of Montage of Heck have made a showing of the lead singer of Nirvana's life - and subsequent violent death.