Deliberate mistake: When the tower is looking around with the binoculars, the picture shows night vision. The binoculars were regular. (00:10:30)
Deliberate mistake: The immortals retrieve firearms from the truck and arm themselves, however they do not take any spare magazines. A handgun's average magazine capacity is 15 +1 rounds, that can be emptied in 2 seconds in rapid fire, Jerry Miculek fired 27 rounds from a 1911 in 3.5 seconds; he's a world record holder but still this gives some perspective on how fast ammunition depletes. (01:18:45 - 01:19:20)