Continuity mistake: When Klytus' ship arrives at the Hawkmen city, it is seen hovering in the sky. In the next shot, it is moving forwards, further away from the city and at a different angle. There is also no engine flare at the rear, which would signify movement. (01:14:00)
Continuity mistake: When Ming is impaled on the nose spike of the Imperial craft, the spike is perfectly horizontal. When he eases himself off the spike, it is pointing downwards much more.
Factual error: A meteorite falls onto Munson's bed, setting fire to it. He covers it up with blankets. But the meteorite is still red hot and would surely burn through, and set fire to his bed again.
Other mistake: When Hans Zarkov is having his mind scanned we see tons of images flash by. The one for "Space scientist fired" is several paragraphs long but only the first one was about Hans. The rest is about a leash law in Wellesley, MA.
Continuity mistake: While Dale is watching the destruction of the palace, her head is either tilted or looking straight, depending on the angle.
Continuity mistake: In Arboria, while Aura kisses Barin she says "I brought you a present", then her left arm swaps from being up to down between angles.
Revealing mistake: When the spaceship flies, Zarkov keeps warning about the g-force and Dale and himself suffer it, yet when he tells Flash to step on a pedal, Flash manages to lift his foot and do everything effortlessly, g-force magically gone.
Continuity mistake: When Flash is seated inside the gas chamber and a hood is being put over his head, he swaps from facing to the left to straight between one frame and the other.
Revealing mistake: When the movie ends and the Hakwmen say thanks, watch for the people on the far left: they become greenish transparent because of the blue screen.
Continuity mistake: During the plane flight, the sky outside keeps switching back and forth between cloudy or puffy clouds opening to let a red light, depending on the angle.
Continuity mistake: The hot hail that falls on the hood of Flash's car disappears in the later shots.
Revealing mistake: While Dale and Zarkov fly to Arboria against a blue screened backdrop they become transparent.
Continuity mistake: When the plane enters the greenhouse the cabin is empty. Then in the close-up Flash and Dale have appeared inside.
Continuity mistake: When Ming walks in the room where Dale sleeps, her thigh swaps from covered to uncovered and the cushion moves around depending on the angle.
Continuity mistake: After the meteorite on Munson's bed starts burning, his hand moves from down to up and is now holding a pen and paper, despite him being asleep. Also the cup on the table moves around between shots.
Continuity mistake: When Flash greets the martians he's handed a gun which makes him crouch and twist to the left. When the angle changes he is now standing tall and his hand is at chest level instead of waist level.
Revealing mistake: When Flash takes a beating after saving Dale, all the kicks he receives are very poorly performed, most of them never reaching his body.
Continuity mistake: When Ming orders to send another charge against Sky City the sky swaps from sunny in the wide angles, to cloudy in the close-ups in barely half a second.
Continuity mistake: When the laser scans Zarkov's jacket to destroy the gun inside, the arm disappears in the close-up angle.
Continuity mistake: The FX of the rainbow coloured dangerous void is missing before the fight starts, revealing a grey coloured, harmless set. (01:09:45)
Chosen answer: Prince Barin was the fiance of Princess Aura, who took a shine to Flash. He was quite simply jealous.
Ioreth