Sentence:  In other crashes, still violent but not as much so as exploding in midair or breaking up in flight, the passengers' survival depends on suffering little or no injury in the first phase of the accident, as when a plane runs off the runway, and then getting out of the plane quickly to avoid a <WSD>postcrash</WSD> fire. 
Meaning of the word marked with <WSD> tags:  After a crash (vehicle accident).