Continuity mistake: Swagger was shot in the upper right chest and lower right abdomen, making him limp badly. When the teacher stitches him up, there is only the bullet hole in his chest. He also miraculously recovers immediately.
Shooter (2007)
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Directed by: Antoine Fuqua
Starring: Mark Wahlberg, Danny Glover, Rhona Mitra, Michael Pena
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More mistakes in Shooter
Mr. Rate: Would've been a bad job to take, though.
Nick Memphis: How come?
Mr. Rate: Whoever took that shot's probably dead now. That's how conspiracy works. Them boys on the grassy knoll, they were dead within three hours. Buried in the damn desert. Unmarked graves out past Terlingua.
Nick Memphis: And you know this for a fact?
Mr. Rate: Still got the shovel.
Trivia: When Swagger is recuperating from the makeshift operation, it's shown that he has a third nipple below the left nipple.
Question: Why does Swagger include 5 tennis balls on the list of medical supplies he hands to Sarah?
Answer: If you cut a slit into them and squeeze when the ball expands back it creates suction. So they could have been used to clear away any blood or pus when cleaning the wound before stitching.