Continuity mistake: When Cortez gets out a photo of his wife pregnant, the photo changes between shots. She is facing a different direction in the next shot. His USMC tattoo, however, stays the same direction throughout the scene. (00:26:55)
Continuity mistake: After the Christmas party and the fireworks blowing up, Swofford is seen sitting at a table drinking Crystal Geyser spring water and talking to Jamie Foxx. Between shots the front of the bottle keeps moving to continually show the Crystal Geyser logo facing the camera for perfect product placement.
Continuity mistake: In the scene where Swofford is threatening to shoot Fergus, in all the frontal shots we see that Swofford's face and ear are touching the end of the rifle. In all of the shots from behind, his face and ear are no where near the rifle. There isn't enough time for him to move the rifle away from his face between shots.
Answer: Strange as it may sound humans take a long time to process the unknown. Once a sniper has patterned the subjects he will take the shot on the one furthest away. Hearing glass break and his friend thud to the floor. The remaining subject will take at least 4 seconds to comprehend what just happened. He will obsever, decypher, and react. Each one of those takes at least a second and a half, maybe a little less. By the time the second guy has comprehended what is going on the second bullet is already hitting its target. In the history of snipers this has been done.
James Rowell