Revealing mistake: At the start when they're clearing the White House field Little Rock shoots her gun without her finger on the trigger. (00:04:20)
Other mistake: The gun choreography in the fight at the Hound Dog just sucks. Nevada picks up the now zombiefied Albuquerque's gun, a Mini Draco AK with a (at most) a 10 round magazine, can barely hold it up but longarms it like a handgun and *brrr* fires at about double the guns actual fire rate. Infinite ammo, zero recoil (with a small stature woman firing 7.62x39 with one hand no stock) and the entire time she's shooting, the gun is pointing right at Tallahassee's head. (01:01:55)