Chloe's car goes from tan when she's driving it down the road, to red when it's hanging off the bridge. [I've watched the scene several times in a row. The car is red the whole time, never tan.]

Near the beginning of the episode, Pete informs Clark that he missed a Science exam that counts for 50% of his grade. Pete tells Clark that "he flunked." Near the end of the episode, Lana asks Clark what he is doing and Clark tells her he is studying for his make-up "History" exam. [When Pete tells Clark about flunking his test, Clark was in a deep sleep. He was dreaming. Later in the episode when Lana brings him his homework, she tells him that the teacher is going to let him make up his test as long as he has a note from his parents.]

When Rutger Hauer first comes into Clark's apartment, Clark is topless. However the shot changes and Clark is suddenly wearing a T-Shirt. [When Morgan Edge's goons come in, they shoot Clark. Clark reaches up, grabs them,and throws them. When he asks who sent them, Morgan Edge said he did. Edge comments on Clark's scar on his chest. Clark responds with an expletive about Jor-El. He then pulls on a green t-shirt. This was not an oversight. It was planned. Ironically, the symbol on the t shirt actually looks like an upside down Krypton symbol.]

In the season 3 episode with Justin, the character who can see people's deaths, we are told he was born on the day of the meteor shower. This would make him 4-5 years younger than Clark and Lana (judging by their ages in the pilot), yet he is somehow in high school with them and getting the same homework. How can this be possible? [The kid had previously been home schooled so he could have easily been advanced for his age and there fore in a higher grade than most kids his age.]

Lois comments to Clark that they need to meet up with their tour guide in Shanghai, because she will speak fluent Mandarin, which neither of them do. However, there is a specific and well-established Chinese dialect spoken in Shanghai, called Shanghainese, which is neither Mandarin nor Cantonese, and that should be the language that their tour guide would speak. [Firstly, Lana went to Shanghai with Clark, not Lois. Secondly, she isn't being specific when she says they'll need someone who speaks Mandarin - she simply means that they'll need someone who can understand the local dialect. Someone with little or no knowledge of China would never have heard of Shanghainese, so when talking about the language they'd call it Mandarin, the more well-known dialect.]

After Chloe, Lana and Lois vanish from Clark's barn you can see Clark's chest with blood streaking down. The problem is the wounds are too far apart to have been made by Chloe's hand. [They were made by magic, since it is magic that he is vulnerable to.]

As Clark speeds away to save Chloe, he is in the middle of a play in the championship football game. One of the other team's defenders is in the air in front of him and is going to sack Clark. Clark goes into super speed, runs to the room where Mxyzptlk has Chloe, knocks the knife out of his hand, pushes him away from Chloe, snaps the links on Chloe's cuffs, runs back out to the field to finish the game with nobody, not even the defender directly in front of his face, realizing he was gone. 1.) In order for Clark to do all the stuff he did and get back, with no one noticing, he would have to run faster than the speed of light. At that speed he would have been noticed as he broke the speed barrier several times over. 2.) The wind turbulence from his body cutting through the air that fast would also have been noticed. The wind from a car going by at 30+ mph is easily felt. Clark's speed could have easily sucked everyone off the field in his wake. 3.) Smacking Mxyzptlk's hand and then shoving his chest at that speed would have caused Mxyzptlk to suffer substantial injuries (broke wrist/hand, broken ribs) none of which he shows later on with Lex. [I disagree with this even being here. This series is fiction and you could say this statement in every episode in the series. This is not a plot hole. This is what you call fiction. We all know someone could never do the things Clark does.]

When Lana is in the shower, you can see steam billowing up around her just as she turns it on. Water can't get that hot, that fast. [For some time now there has been available "point of use" water heaters, also called "tankless water heaters". If these are installed near the shower you will get hot water immediately.]

Near the beginning of the episode Clark makes a diamond by squeezing a piece of coal with his super-strength and the diamond emerges as a beautifully cut and faceted gem. Diamonds have long been considered to be one of the hardest properties on earth and even with super-strength, could not be honed to this degree by bare hands alone. [We can pretty much throw out most of the laws of physics, if they say he can make a diamond, then he can do it, either that or every single thing he does has to be considered a mistake, since none if it is actually possible.]

When Professor Milton Fine/Brainiac tries to stab Clark with the crystal while they are fighting in the Fortress of Solitude, Brainiac is holding the crystal in his left hand. But when we next see the crystal after Brainiac is impaled, the crystal is in his right hand. [Milton Fine possesses super speed. He could change which hand holds the crystal faster than someone could see. It is also screen long enough for him to do it make the transfer at normal speed.]