In the Final fight scene leading up to the big battle between Todd and Caine you see Todd (Kurt Russell) Come up out of a large puddle to battle other soldiers. If you pay close attention or even slow-mo this part, you will notice that the fire behind Todd is flaming back to the water rather than rising out of it. I understand that they likely filmed Russell going into the water so he wouldn't have to hold his breath for extended periods during shoots to get the perfect shot... But this should have been caught and remedied.