Revealing mistake: In a wide shot of the supposedly deserted city, car and bus traffic can be seen in the middle background at the left of the frame, driving along the roadway. (00:27:25)
Revealing mistake: Watch when Dutch throws the flash grenades during the stadium scene. When seen igniting on the ground, they are positioned closely behind large boxes and other bulky debris, to hide the special effects used to create the light. It would be virtually impossible to toss the grenades any distance and then have them drop down into place so perfectly on the far side of the conveniently placed obstacles.