Russell Crowe is unhinged. I mean, we knew that before -- hide your phones! -- but now it's official. The Oscar-winning actor stars in the indie thriller Unhinged, which in an unhinged move, is apparently being released into theaters on July 1 by new distributor on the block Solstice Studios. Crowe plays a guy who's been having a rough time when a young mother (Caren Pistorius) in the car behind him leans on her horn at the wrong time. "Road rage" doesn't begin to describe what he sets out to do to her and everyone she knows. Derrick …