When he hits the supercharger, you get a boner. Every time.
This scene was apparently so dangerous to film, that the stunt driver of the tanker truck was not allowed to eat 12 hours prior in case he needed to have surgery.
Humungus was originaly supposed to be Max's partner Jim Goose. They decided against this, but left a few hints, such as horrible burns behind Humungus' goalie mask, his raider's use of police vehicles, and his own use of a similar weapon to the MFP's standard sidearm.
Mel Gibson only had 16 lines of dialogue in the entire film, and two of them were: "I only came for the gasoline."
According to trivia book "Movie Mavericks" by Jon Sandys, one of the more spectacular stunts in the film was actually a serious accident. One of the motorcycle-riding raiders hits a car, flies off the bike, smashes his legs against the car, and cartwheels through the air towards the camera. This was a real, genuine accident: the stuntman was supposed to just fly over the car WITHOUT hitting it. But the near-fatal incident looked so dramatic that it was kept in the movie. The stuntman broke his leg badly, but survived. (If you look at the stuntman's body frame-by-frame through his cartwheels, you can see that one of his legs is bending at a slightly unnatural angle around the knee...ouch.)
Stuntman Guy Norris
The dog used in the film, named simply "Dog", was obtained from a local dog pound and trained to perform in the film. Because the sound of the engines upset him (and in one incident, caused him to relieve himself in the car), he was fitted with special earplugs. After filming was complete, he was adopted by one of the camera operators.