Deliberate mistake: When Selfridge says "Pull the plug" after Hometree is destroyed, two soldiers, one male and one female, go to shut off Jake and Grace's avatar links. The female soldier goes straight to Grace's link and terminates it, but the male soldier gets delayed (punched by Norm) before he can terminate Jake's link. This is deliberately shown out of sequence - we see Jake's link terminated before Grace's. The result is that we see Grace's avatar fall unconscious when Jake's link is terminated, and Jake's avatar fall unconscious when Grace's link is terminated.
Avatar (2009)
1 deliberate mistake
Directed by: James Cameron
Starring: Sigourney Weaver, Giovanni Ribisi, Zoe Saldana, Michelle Rodriguez, Sam Worthington, Stephen Lang, Joel Moore
Continuity mistake: When Jake first gets into the "syncing" device and he says, "This is cool," Grace's hands are already on his leg. In the next shot she reaches for his legs, where he replies, "Don't, I got this."
Trivia: During the final battle, Lyle Wainfleet's AMP Suit gets knocked down and crushed by a charging Hammerhead Titanothere. Wainfleet utters a Wilhelm scream just before he's crushed. (02:21:05)
More questions & answers from Avatar
Chosen answer: Jake and Neytiri were holding hands and Neytiri had her hair unbraided. It is also possible that when Na'vi mate, their appearance changes slightly in a way that only other Na'vi could see.