“Aftermath” is a plane crash movie without a plane crash. Instead, the closest we get is a scene set in the control tower, where a computer screen shows two triangles headed straight toward one another until both glow red and then disappear from the monitor altogether. There’s no boom, no screaming passengers, no great big whoosh as cocktails and carry-on bags get sucked out a gaping hole in the cabin — just the aftermath, which in this case, entails a bedraggled-looking Arnold Schwarzenegger trying to make sense of his loss.