Continuity mistake: As Chief Phillips is shooting he yells, "You savages, come and get it". After he says this the warrior with the spear who eventually kills him can be seen on the shore running in the opposite direction. In the next shot Lance, who is now at the controls, guns the engine. The boat moves forward, not in a circle, yet two shots later when the warrior throws the spear the boat is further back down the river than it was before not further up the river where it should be.
Continuity mistake: As Chef is firing the rear machine gun there are two belts of ammo on the 60 caliber gun behind him, one hanging out of the gun itself and the other one draped over the gun's protective metal side. In the next shot as the captain runs up to him there's only one belt of ammo.