Continuity mistake: As Victoria is being drowned in the bathtub, she appears very deep in underwater shots and only a few inches down in overhead shots. (00:26:00)
Continuity mistake: At the beginning, when Seth picks up the barbell to beat Troy with, Troy is at the end of the locker room with the showers. As Pete and Clark show up, Troy is at the other end of the locker room.
Continuity mistake: When Jonathan is sitting down, before he tells Clark that he can't always be honest, in the shot from the other side of the table Jonathan is holding a book in his right hand as he is sitting down. When the shot switches to Clark's right, Jonathan is still starting to sit but now the book is in his left hand.
Continuity mistake: When Kyle first confronts Rickman in his office and challenges him to a handshake, Rickman looks away. In the next shot on Kyle, Rickman is looking at him again. (00:13:20)
Continuity mistake: While Chloe and Clark are on the horses, and Chloe is talking about the surveyors from Rickman Industries, when the shot is on Chloe's side, Clark is holding his reins in his right hand which is resting on top of his left. When the shot switches to Clark's side, as Chloe continues the story, and now Clark's right hand is under his left.
Continuity mistake: When Kyle goes to confront Rickman about coming to Smallville, Kyle is talking about how Rickman agreed not to do anything in Smallville and Kyle is pointing with his left hand. When the shot switches he is now pointing with his right.
Continuity mistake: When Clark is in hospital after being thrown to land on the roof of the car his mum is helping him put a shirt on. He puts it over his right shoulder and the shot changes, his arm is all of a sudden in the sleeve.
Continuity mistake: After the encounter in the meat locker, Lex and Clark talk outside Fordman's store. As Lex turns to leave there is a truck driving down the street in Clark's direction. When the camera switches to Clark, the truck, which should be in this shot going behind Clark, is nowhere to be seen.
Continuity mistake: When we first see the meteorite tattoos on Wade Mahaney, they are all green. When Clark sees Whitney's tattoo, it is plain black. It was also faded, which means it's not a fresh tattoo. Whenever Clark runs into the other guys, he feels the effects of the meteor rocks, but never when he is alone with Whitney.
Continuity mistake: The lime slices on the side of Lex's and Amanda's drinks, in Club Zero, change position between shots.
Continuity mistake: While Lana is climbing the windmill, just before she stops a shot from below shows her right foot right above her left foot. The camera switches to above her and suddenly her left foot is a full rung above her right foot. (00:27:10)
Continuity mistake: When Chloe is first asking Pete and Clark the questions for her poll you can see that the top page on her clipboard is yellow. Then she shows it to Lana and the camera gives you a nice big shot of the front piece of paper and it is white. When Chloe says "its unleashing the inner Lana." the front of the clipboard is shown again and now the paper is yellow.
Continuity mistake: When Lana and Clark are sitting on the Windmill and the camera is facing them close up you can see the shadow of the windmill moving in the wind but when the camera zooms out the windmill is not moving at all.
Answer: The kryptonite only creates mutations when it reacts with the environment and an individual. Remember, the FDA and several environmental groups did check out Smallville after the meteor shower, but found no danger in the rocks. Obviously they're not always emitting mutating rays, or all the flora and fauna of the surrounding area would be horribly mutated.
Phoenix