Continuity mistake: Roxanne continues to prepare the pipe for Captain Willard and says, "he would rage and he would cry, my lost soldier, and I said to him there are two of you". In the shot of them from the foot of the bed Roxanne's head is almost touching the captain's but in the next shot over the side of the bed she's about a foot away. (02:16:55)????
Continuity mistake: Just before the Medevac helicopter lands in the Vin Drin Dop plaza, a soldier machine guns 13 urns sitting next to the building on the left of the courtyard and the building also explodes. In the next shot of the medics working on the injured soldier the 13 urns are back and the building hasn't exploded yet. (00:43:05)????
Continuity mistake: Dennis Hopper says, "Zap 'em with your siren, man. Zap 'em with your siren," as they get close to shore. At first there's no smoke and unarmed natives behind him and the smoke changes to red in the close-up. Then in the next close up there's orange smoke and armed troops behind him. (02:29:15)????
Continuity mistake: When the helicopters first attack Vin Din Dop we see eight in formation attacking from the beach with the bridge on the left. One second later we're in a helicopter attacking from the other side of the bridge and we can see the entire beach. From this angle we should be able to see all eight helicopters, but we don't and we also don't see any smoke on the beach from the explosions in the previous shot. (00:39:55)????
Continuity mistake: During the beach party as Captain Willard is saying, "He was one of those guys that had that weird light around him." Note he is holding a cigarette and drinking a Schlitz, with four cans of Budweiser in front of him. In his next shot, just seconds later, there is another can of beer and the cigarette is gone despite the fact he has not moved at all. (00:32:00)????
Factual error: There are two factual errors in the helicopter attack scene - for the time frame of the war. First, the helicopters carrying troops would not have been armed with rockets or miniguns, these helicopters were called "slicks" and would only had door mounted machine guns. The helicopters armed with the rockets and miniguns were "gunships" and would not have been carrying troops. Second, a Huey is shown carrying in the Navy river patrol boat (PBR) slung beneath it. At over 16,000 lbs., a PBR weighs over four times more than a Huey of this era could have lifted. (Regardless of the REASON why these mistakes occur in the film, they are STILL mistakes.)
Continuity mistake: Dennis Hopper stands on the back of the boat and says to Captain Willard, "Yeah, well, they think you've come to uh - , to take him away". If you look to the left of the screen you'll see a piece of seaweed hanging off the roof of the boat. When Dennis Hopper walks back to the front of boat it's gone. (02:30:15)????