Michael Fassbender (Shame, 12 Years a Slave) stars as an introverted prog/punk/folk/experimental rock singer who recruits/kidnaps a wannabe keyboard player (Domhnall Gleeson from the Harry Potter films) and tries to hit the big time at Austin's SXSW music fest. Also, he wears a giant, papier-mâché head. At all times. Very loosely based on a stage persona created by British comedian Chris Sievey, this oddball black comedy is freakishly funny, weirdly touching and ripe for cult worship. 95 minutes R.