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.
Continuity mistake: After Klytus dies, the position of his right hand and arm changes drastically between shots.
Continuity mistake: When Klytus dies he is facing down; an instant cut later he is facing sideways.
Continuity mistake: When Dale hugs Flash before his fight in the ring, the position of both of her hands is inconsistent between shots.
Continuity mistake: When Kala is shot, she falls forward. From a different angle, she remains standing upright.
Continuity mistake: When Ming is about to die, he slips away from the spike, which has parts of it covered in green blood. When Flash sees him, the spike is fully covered in green blood.
Revealing mistake: When Ming dies, one can see his real left eyebrow. The makeup covering it is missing.
Revealing mistake: Zarkov's rocket blasts through the greenhouse ceiling, but doesn't burn or scorch a single millimeter of the place.
Continuity mistake: The pilot hands Flash a People magazine to sign. When Flash sits down to autograph it, one can see it's already signed (seemingly from previous takes). Then he scribbles on the same spot again.
Continuity mistake: When the movie begins, Flash is reading a newspaper, sitting sideways, his back leaning on the door. When Dale's van arrives, he is facing straight, with the paper resting on the steering wheel. Then the shot changes to the first position and he turns sideways towards the wheel.
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.
Answer: Since one meaning of "bore" has to due with digging tunnels and they are used in the torture scene, one can assume that they are worms that eat holes into your flesh.