I find it near impossible to hit his backside. I even tried using the Leviathan and lobbing the rockets to his back, but no matter what angle I'm using, they either don't hit or they disappear into the sky and land way off. And yes, I'm trying to solo Crawmerax since it's on my PS3 and I have 3.55 CFW which translates to no online play. I've gotten everything else down except for the last spot on his back. EDIT: I figured out the problem. The Siren's added bullet velocity caused the rockets to propel much faster than usual, interfering with the lob effect. I managed to kill him using the splitscreen multiplayer and got Player 2 to get him to turn around.
