Question: Throughout the movie you see War Boys making a big deal about Valhalla just before dying in battle, not to mention Nux talking in detail about it, but suddenly it didn't seem important to him before he kills himself. What is the significance of Nux saying "witness me" just before he sacrifices himself?
Chosen answer: Bravery in battle meant everything to the warriors in the film, and dying in battle was glorious and a sure ticket to Valhalla (a warrior's heaven). Nux's words of "witness me" were to let everyone know to remember and talk about his brave sacrifice, so there would be no question to others he died bravely in battle and enter Valhalla.
Question: In the Canyon, when Immortal Joe tells Nux to kill Furiosa and return his treasures, what does he mean that he'll personally carry Nux to the Valhalla gates?
Answer: Immortal Joe is trying to inspire Nux to complete the mission, and that he would be honored to deliver Nux's soul to Valhalla, the ultimate heaven for the warriors working for Immortal Joe.Everybody in the film fears and reveres Immortal Joe, to the point he is almost a god and some of his warriors are excited when Immortal Joe even glances at them. For Immortal Joe to tell Nux this is the highest honor and recognition that Nux could receive from Joe.
Question: How was the canyon pass able to be clear, and the rock bridge brought down a second time? On the way back through the pass? Did they just rebuild it in that short time? Earth movers, and cranes, and work crews just happened to come out for overtime and finish before everyone came barreling back through?
Answer: The canyon pass was cleared by Immorten Joe's men - the archway was never blown up. it was the canyon side in front of the arch that was destroyed.
Answer: Presumably he is killed. He is attached to the truck with bungee cords and has no protection from the force of impact in the crash, which is sufficient to break the rig into pieces. There is no way he could have survived the crash.