The Peter Jackson Lord of the Rings movies are just about my favourite movies - certainly judged by the number of times I've watched them, and by my tendency to blub during them; but on the eve of The Hobbit (which I await with some trepidation) - here is a round-up of the lamest scenes.
1. Everything to do with The Ents - their look, the voice of Treebeard, the dreadfully bad editing, the facetiousness - but worst is the scene when the Entmoot has decided not to attack Saruman (!) then Treebeard (the great tree herder) suddenly notices for the first time that S. has cut down half of his forest; instantly changes his mind, summons the other Ents - and they are immediately just there and immediately go along with his new decision!
2. The whole utterly pointless and functionless plot loop of Aragorn-falls-off-a-cliff, they think he is dead and half-heartedly mourn him, he isn't dead and he wakes up, gets on his horse and rides back to rejoin the others.
3. When Gandalf rides out from Minas Tirith onto the Pellenor Fields to rescue the retreating Faramir from the Nazgul - he carries Pippin with him on Shadowfax!
(This one would get my wife's vote as number 1.)