Continuity: In the gym, the way Ross places the white towel around his neck changes between shots.

Audio problem: When Gus is talking Brad into opening the glass door, the reflection of his mouth doesn't match match what we are hearing.

Continuity: When Superman is landing Jimmy, a fireman in the back takes his oxygen bottle off twice.

Continuity: When phone booths fall, they don't knock down a blue bucket; but a frame later, in a close up, it's seen down on the floor.

Continuity: When Clark is trapped in the crunching machine, a blue piece of metal is left out. Two shots later it has disappeared.

Revealing: Bad Superman supposedly holds Clark by the back of his shirt, but what we really see is his hand behind the back and not holding anything. Just closed in a fist.

Continuity: When the telephone booths fall, the dog runs away. A second later it's seen back where he was running away again.

Continuity: When Gus is trying to access the main computer, his reflection shows him bending down. In the next shot he is repeating the movement.

Continuity: When bad Superman knocks out Clark with a kick on the face, his position on the floor changes between shots.

Deliberate "mistake": There is no way for Gus to jump over the terrace with the skis since there's no ramp. He would have crashed against the wall and the flower pots we saw in a previous shot.

Continuity: When Superman saves Ricky at the wheat field, the rock by his head disappears.

Continuity: At his computer Gus mispells Overide, which is spelled Override.

Continuity: While the blind man is walking his dog, a man in blue jean walks by the left of a tree. There is a brusque cut and the man in jeans is now walking on the right side of the tree.

Continuity: When bad and good Supermen is going up on the junkyard belt, one shot shows Clark very close to a car, in the next one he has gone down and the car is farther away.

Continuity: When bad Superman is flicking the peanuts, the man by his left stands up and hides at the end of the bar. In the next shot he is seen close to Superman reflected on the glass.

Continuity: The lady by the bingo trolley leans her head to the right and asks "Can we have the next number?" When the angle changes her head is now leaning the other side.

Continuity: While in the bus to Smallville, Clark sees the accident on the heliport and there are no cars on the side of the road. From a shot outside it's full of them.

Deliberate "mistake": When a man bumps into pole, it sounds as if a truck had crashed (which makes it funnier), but in reality he just bumped his chest.

Visible crew/equipment: When Superman is landing to stop the plough machine, the wires holding him are visible.

Continuity: While Mr. White is trying to open the bingo ball, from the side shots the lady is watching the ball. From the front shots she is watching him. This keeps taking place every time angle angles.