Continuity mistake: When Furiosa is explaining to Max about the kill switches when the war rig is stopped, she begins to put her mechanic arm on. When the view changes, she is again beginning to put it on.
Continuity mistake: The bloodline between Max and Nux is entangled with the chain, but after the fight with Furiosa, when Max is sitting on her back, there is a shot where the bloodline is free from the chain. Later it's entangled again. Also the line is less than 2 ft long after Nux cut the chain, but at the end, when Max is preparing the transfusion it's much longer.
Continuity mistake: In the end chase the fuel rig starts to explode and Max jams the throttle with the people eater's foot and jumps to the war rig as the fuel rig is completely engulfed in flames and the trailer starts to explode. Moments later when Max is fighting the pole cat, the fuel rig isn't on fire so much and explodes a second time.
Continuity mistake: When Immortan Joe's body is thrown from the car it lies parallel with it, but when the crowd rush in it's now at an angle, with his feet pointing away from the side of the car.
Continuity mistake: Towards the end of the film, when Max is fighting the guitar playing doof warrior on the doof wagon and the guy loses his guitar, it then cuts to a front shot of the action on the vehicles in front of the 'band wagon' but in the background the guitar guy is still playing, it then cuts back to Max fighting him without his guitar.
Answer: The truck was stuck in the sand and they had to use the tree to winch it out - the tree was used as an anchor. The weight of the truck and soft sand pulled the tree out.