Revealing mistake: Remo, clinging to a tree trunk, is shot at by Grove using a vehicle mounted machine gun. Pieces of trees are seen shot but this is only sound and special effects. There are no muzzle flashes from the machine gun, the cocking handle does not move in time with the shooting, nor does the cartridge belt move through the weapon.
Revealing mistake: Remo picks a dry branch off a bush and rubs it to start a fire. When the angle changes, the branch has been dipped in a burnable liquid and easily lights up.