Max: My name is Max. My world is fire and blood.
Max: You know, hope is a mistake. If you can't fix what's broken, you'll go insane.
Nux: I live, I die, I live again.
Nux: What a lovely day!
Max: Here they come again... Worming their way into the black matter of my brain. I tell myself, they cannot touch me. They are long dead.
Immortan Joe: Do not, my friends, become addicted to water. It will take hold of you, and you will resent its absence.
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.