Furiosa is clearly shown pulling a knife from her side. But just moments later, a close up is shown of the knife still in her.
Furiosa gets a bloodied nose and lip in her fight with Max. But by the time Max gets her on her stomach with a gun pointing at her, her face has no blood anywhere.
Immortan Joe's windscreen on his monster truck appears and disappears throughout the movie.
When the War Rig first passes through the canyon, it appears that one of the two flags on the trailer was knocked off. Careful viewing shows that the flag that appeared to have been knocked off was only bent flat against the trailer, where it remains for the remainder of the film.
The length of the chain attaching Max and Nux varies in length. In particular when Max wakes up after the sandstorm and walks to Nux's car, it's shown to be long. But when Nux has hold of the bolt cutters and stands behind Max to cut it, it's actually quite short.
Near the end of the sandstorm chase, Nux has an inch or more of fuel sloshing around on his floorboards, and he strikes a road flare, preparing to immolate himself to stop the War Rig. Magnesium road flares constantly drop burning embers from the moment they're lit; this can even be seen in the film during a close-up. The car should have ignited the instant Nux struck the flare - even without the embers falling into the fuel on the floor, the cabin of the vehicle would have been full of explosive vapors.
When the fuel pod is detached and crashing, the tires turn freely. it had been shown that when the air lines are disconnected the tires lock up.
The concept of blood type O as the "universal donor" is in reference to packed red blood cells, which are the most commonly transfused blood product. But when Max's blood is transfused, they are transfusing whole blood, which contains both red blood cells and plasma (the liquid component of blood). There is no universal donor for whole blood. While Max's red cells would cause no problems because they are type O, having neither the A or B antigens on their surface, his plasma could cause a transfusion reaction if he had a high titer of anti-A/B antibodies. With a patient bleeding out like Furiosa, the transfusion reaction would be worth the risk, but for "topping off" purposes, the risk might outweigh the potential benefits. For non-emergent whole blood transfusions a same-type donor would be used.
If Max had let Furiosa rest her SKS rifle on his shoulder as she fired, he would have suffered permanent hearing loss.
The vehicles are mostly powered by turbo and/or supercharged engines. Most of which have no form of air filtration. A supercharger or turbo charger without an air filter would be destroyed within minutes in such a sandy environment. We see these engines operating at full throttle in dust storms ingesting huge amounts of dirty air straight into the supercharger/turbo yet none of them ever fail.
There are several scenes in which people, including The Splendid Angharad, grab onto the vertical exhaust pipes for support while crawling around on the outside of cabin of the War Rig. Truck exhausts can often reach temperatures greater than 350 degrees Fahrenheit, which would have made holding onto them with bare hands impossible.
Max's tattoo in the beginning of the movie says that he is 10 hands tall. If one used the current equestrian measurement of one hand (the width) being four inches, it would mean that Max was 3'4" tall - which he clearly isn't.
In the film, however, there are no references to horses nor any signs of them, thus no reason to assume the equestrian measurement is being used (or even known about). If the length of a hand were used instead of the width, ten hands would be about right. Fingertip to heel of an adult male hand is roughly seven inches which would make ten hands a measurement of 5'10", whereas Tom Hardy is actually 5'9" tall.
The shot of Slit's foot pressing the accelerator in the Razor Cola car is actually a shot of Nux's foot pressing the accelerator in his car, with "NUX" digitally removed from the brake pedal.
After Max is captured in the films opening moments, he is seen getting a full back tattoo of various words and phrases, amounting to his 'medical chart.' Moments later, as he puts on a shirt and attempts to escape, the shirt is dry. A fresh tattoo, un-bandaged, is an open wound that would be bleeding and soaking through the shirt.
The train car has spears/spikes coming off of it for protection, however as people run or walk by and hit them, they bounce, showing them to be rubber, not metal.
When the people run up to Immortan Joe's dead body, there's clearly no body actually there. Just his clothes laid out on the sand.
Immortan Joe releases water from the Citadel and it looks like a waterfall pouring down to the people at the bottom. But when the people actually run up underneath it, very little water is actually pouring down.
The marine compass on Immortan Joe's dashboard is heard to click as it spins. The compass free-floats in an alcohol and water mixture and does not click.
When Nux is shown shouting "She's ours, Slit!" through his windscreen, his lips don't actually move.
When Nux is shouting "He looked right at me!" through the windscreen, his lips are out of sync with the words.
When Max shouts "That's my head!" at the War Boys, his lips are out of sync with the words.
In the first shot of the guitar war-boy, a camera and disguised cameraman can be seen between two sets of speakers.
The camera lighting is clearly visible in Max's pupil in an evening scene on the desert after the Vuvalini encounter.
After the "I'm gonna need you to drive, I'll get him out of our way" scene, there's a crane in shot revealing Max behind the "Doof warrior", you can see clearly the shadow of the crane in the The War Rig (left side of the screen below)
Furiosa talks about a "160 day" ride across the salt desert, on their fully loaded motorcycles. This makes no sense; as (a) they simply couldn't carry enough gasoline for that length of time - motorcycles get 30-50mpg, and the bikes couldn't possibly carry more than 50 gallons each, (b) they couldn't carry enough water for that period of time (humans require about a half gallon per day), and, most importantly, (c) no desert on earth is anywhere near that possible distance. In fact, presuming that they could indeed ride the entire time, a 160-day ride across a hard-surface desert (600 miles/day) is sufficient to circle earth almost FOUR TIMES. A 160 day WALK at a relatively easy pace (10 hours/day, 3mph) will still cover a distance almost TWICE the length of Australia, and would be sufficient to travel from Korea to Germany across the breadth of Asia.
The canyon is completely cleared of all the rocks on both sides when Furiosa and the others head back through it to return to the Citadel. It would have been impossible for Joe's men when they first drove through it to not only make enough room for their biggest vehicles, like the war band machine to fit through, but also to completely clear the area of the huge rocks and still join him by sunset to pursue the war rig.
The tanker full of mother's milk on the back of the War Rig would have slowed the vehicle down considerably at a time when speed was of the essence. They were almost able to outrun the other vehicles with the tanker in tow. Had they jettisoned it, they would have been much faster.