Didiodo
"HARRI O WISE ONE " More speculation guess in the way that the Avatar drivers were a little bit ruffled feathers as Harri had negotiations with his former human business partners as not let the Navi tribesmen kill them. As Harri was more dissatisfied with outcome . But please remember Harri is not Jake Sully ( he not a complete jar head soldier like Jake is) While Harri is older in human standards but younger by Navi tribe standards ( as Harri will try diplomacy before Jake Sully does I think, but since he said looking for retirement in the beginning but didn't last long for him either and no idea of the potential long term ramifications for what happening in Avatar movie 1 . Along with him preparing accordingly to live & learn like a real life Navi ( he doesn't have another body to go back) as Avatar drivers were not up standards for long term users. Besides the world tree, The Avatar drivers would have understood that by using their liu to connect with the World tree( but still thinking in human terms not Navi culture norms by the Harri estimated. Luckily they got a got off easy and tracked down the Ubobanium as Ra's found that machine ( that location of the all the Navi tribes. While Harri destroyed it just in time for a delayed inevitable War coming to Pandora world. Erstwhile, Harri was sent to return the Avatar drivers but were not Navi shape as Harri was used it after a while. But still has a way to go before returning back to the human settlement at the with young Avatar trying to keep up. We"ll see how it goes next time for our unlikely Navi Harri with Ra Sar, Pandora world itself, including a war on the horizon still coming up at the meantime. Catch ya later Cheers!