I’m an enormous fan of the LOTR movies. I’ve seen them zillions of times, been pissed off when they didn’t win every oscar ever, etc.
However, there are a few parts (I will restrict my comments to FOTR, which I’ve seen far more times, given that it’s out on DVD) which I think are definitely flaws. To wit:
(1) My biggest gripe is probably the scene after the cave troll fight when the fellowship is fleeing through the big empty hall, and a truly ludicrous quantity of goblins suddenly show up. For one thing, this is one of the few spots where the CGI really looks poor. But more importantly, how on earth can there be that many goblins there? Why is there a goblin army that large hanging around in Moria? Who are they there to fight? How do they eat? Why didn’t they all show up 5 minutes earlier and bury the fellowship under their combined weight? Why do they pause dramatically, despite outnumbering our heroes 10,000 to 9, just long enough to be scared off by the Balrog? And why are they so scared that they don’t bother taking the 2 seconds that it would take them to all fire arrows and puncture our heroes like pincushions? Oh, and since when can they climb like spiders?
(2) Speaking of that big empty hall, what’s the point of it? Why would the dwarves build a huge useless area like that? If that’s the realm of the dwarves, shouldn’t there be houses, temples, buildings, corpses, something?
(3) When Aragorn and Frodo are caught on the broken staircase, they just stand there dumbly, and somehow, miraculously, in violation of all laws of physics, it topples over in exactly the right direction. That whole part has never looked right to me. Would it have been a terrible violation of Tolkein Canon to have Gandalf do something subtle but magical that ensured that the toppling would happen correctly? Or could our heroes have come up with some clever plan involving rope or jumping up and down or something? Heroes as steadfast as The Fellowship shouldn’t have to depend on sheer dumb luck like that.
(4) How does Gollum manage to follow them through the mines of Moria? How does he get through the door in the first place, given that it was buried shut? Where is he when the goblins are filling the hall? How does he get across the bridge? For that matter, how does he follow them through Lothlorien without the elves knowing?
(5) The Nazgul, while scary looking, seem totally harmless. First, many of them on horseback have 4 hobbits on foot completely surrounded, and yet the hobbits randomly get away. Then, many of them with swords have 4 hobbits on foot with daggers (who don’t know how to use the daggers) completely surrounded, and barely manage to stab one of them, before being completely routed by a single guy with a sword and a torch.
Anyone else?