For every musical act that’s made it big, there are thousands that have languished in obscurity, but when it comes to movies, it’s rare that a band that comes to naught gets much screen time. Achtung Baby celebrates it’s 20 year anniversary this month, and joining the chorus of reminiscences about U2′ s legacy and impact is Killing Bono , a slightly sour Irish comedy about not making it big directed by Nick Hamm ( Godsend ) and based on Neil McCormick’s memoir Killing Bono: I Was Bono’s Doppelganger .