Character mistake: Kimble has just finished talking on the phone with his lawyer when the cops hear the noise in the background. They figure out the sound is that of an El-Train. They then start to list the different places that have an El. One of the cities they name is Milwaukee - there has never been an El-Train there.
Character mistake: After Kimble jumps from the drain pipe over the waterfalls, the scene goes to Gerard standing in the pipe telling his crew to leave, then they all leave without picking up Gerard's gun that Kimble threw down next to him.
Character mistake: The investigators say that the prints found in Sykes' apartment belong to Kimble after dusting for them, making it clear they didn't use any equipment for fingerprint analysis or testing. No forensic investigator would confirm who the prints belong to until they run a thorough analysis. It seems as if they were basing the fact that they belonged to Kimble because they traced the call to the apartment, rather than acknowledge that the prints could belong to someone else.
Answer: Kimble is watching as the doctor, Al, looks at the chest film and states "possible fractured sternum, he's stable," and we can see Kimble's bothered by that. Then Kimble is told to take the boy to observation room 2. When Kimble questions the boy and looks at the chest film, Kimble ignores what he was told, and instead heads directly for the surgical OR. In the elevator he draws a line over the incorrect essential diagnosis: "depress chest w/ poss fr" (possible fracture), and begins to write "Ao," then he scribbles a signature on the Patient of Dr line. The essential diagnosis Kimble writes is presumably an Aortic trauma, which is a life-threatening critical injury and requires immediate attention. So when Kimble brings the boy to the OR (instead of observation room 2) for the emergency medical procedure, he tells the doctor the boy was sent up from downstairs. The child is then taken to operating room 4, STAT, saving the child's life.
Its a pneumothorax, is air trapped between the lung and the ribcage and it's very common.