10 Question for the Movie "Avatar"

Question 1: For the part where Jake was fighting his expedition leader in his Avatar form and the expedition leader in his armoured machine. When Jake lost contact with his Avatar at that time, and came back to form as a normal human, how did the Na'vi princess know how to use the oxygen inhaler on Jake?

Question 2: Since the red dragon was the " King of The Skies " why was Jake's take over of it seem so easy without getting injured? Just jumping onto it and connecting the end of his "hair" to the dragons "hair" and just take over it?

Question 3: How can the expedition leader(commander) allow a disabled person to go on the expedition? Isn't he supposed to cure him before he goes for the expedition? It would not be too futuristic as that movie is in the future right? In case anything happens in the real world of the humans, the marines in the capsule can evacuate quickly, but if Jake was on wheelchair, he would not be able to evacuate as fast.

Question 4: Why does the wheelchair Jake used in the movie look so much like a modern day wheelchair? Isn't it supposed to be a futuristic show?

Question 5: Why is it so that in the front part of the movie, Jake always happen to wake up at the right time, as in he was already in the ' Na'vi world ' when the Na'vi princess happen to be awake too, and is that too much of the coincidence? That would be a great change in the plot if it was written in a way that when the Na'vi princess tries to wake Jake's Avatar up and it does not respond, she would already feel that something was fishy at the front of the story.

Question 6: What does the Na'vi tribe eat? It isn't shown in the movie at all if I remember correctly.

Question 7: Why would most of the dragons that do not have an owner stayed so obediently on the cliff? Why would they not be flying around? This would then make the Na'vi's job of taking ownership of one harder right?

Question 8: How were the humans able to find the DNA from the Na'vi tribe? Even if it was from dead Na'vis, the other Na'vis would already have found them invading their territory and chased the out!

Question 9: How did the humans even knew that there was a ore below the land of Pandora?

Question 10: Why were the colleagues of Tommy, Jake's brother, look so normal and do not look sad even after the death of Tommy?