The cowboy's arm arm when telling Cole "I'm gonna miss you" in the car.
Cole is shot in the right thigh, limping momentarily. In following scenes there are no residual signs of injury and his jeans are intact - not even a tear or blood stain where he was hit.
All the helicopters in Paraguay seem to have a N-registration, which is of USA origin.
Throughout the film, there are an unusual number of left-handed gunmen present.