Lord of The Rings: Fellowship of The Ring - Mutant Hobbit
After Aragorn tells Frodo to run near the end of the movie, Frodo has three arms... One holding the ring one holding the scabbard and one drawing the sword! (For those of you who think he merely put the ring away, they show him holding it just before they do the close up of his dagger.)
No slipup. if you look closely you can see hes not fully gripping the sword with his whole hand. he has 2 fingers holding the ring. it is quite apparent.