(at around 1 min) There is a long camera shot of Erika and Jake standing in front of a picket fence, facing each other, about 25 feet apart. They start charging at each other and the camera shows close-ups of each, cutting back and forth between the two, as they are in a full sprint for seven seconds. The camera then switches back to a long shot, and you see that each of them have moved only about four feet.
About five minutes in in the middle of the battle ejected empty shell casings are shown landing on the floor. The problem is that they are actually full cartridges with the bullets and powder intact. That's not going to happen.