Revealing mistake: When Imortan Joe's body is thrown from the car by Max at the end, if you look closely when the crowd rush in it's just his costume there and no body.
Mad Max: Fury Road (2015)
Trailers
Directed by: George Miller
Starring: Charlize Theron, Tom Hardy, Nicholas Hoult, Zoe Kravitz, Rosie Huntington-Whiteley
More trailers
More mistakes in Mad Max: Fury Road
Immortan Joe: Do not, my friends, become addicted to water. It will take hold of you, and you will resent its absence.
More questions & answers from Mad Max: Fury Road
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.