Factual error: When it's 1969 we see a boy (I'm not sure which one so you'll have to look) riding a Shwinn Sting-Ray Krate Grey. That bike didn't come out until 1971 and they only made them that one year. (00:02:45)
Factual error: When the soldiers are asked to find out what gifts Andy is getting at his birthday party, the set out down stairs with half of a baby monitor. Well, any parent who owns one knows that there are 2 pieces to a baby monitor. One half (the larger half) is the receiving end (that takes in the noises) and a smaller half which is the transmitting part (the half that sends out the noises). The half that the soldiers take downstairs to talk through is the wrong half. They take the half that the noise comes OUT of. So, really, they should NOT be able to speak into this part - in real life, they'd hear what was happening up in Andy's room. (00:09:18)
Factual error: After taking off from Bangor, the pilot pulls back on the flight control bringing the plane up to level flight. However, after taking off, a plane is "nose up" and would require pushing forward on the controls to bring the nose down to level. This is also evident by looking at the attitude indicator (circle with top half blue and bottom half brown). The white line indicates the horizon and you can watch the indicator show the plane's attitude coming from below horizon (nose down) to the horizon (level flight).
Factual error: When the bully has been shocked and his heart stops, Powder zaps him back to life. Okay, fine, but as a former ER nurse I noticed some flaws. 1) You can not get a person's heart beating by defibrillating if he's flatlined. You need some sort of activity in the heart first. If Powder had started with some CPR, possibly. 2) Defibrillating someone in a puddle of water? Bad move, unless you assume that Powder's immune to his own shocks. And 3) when defibrillating you hold one paddle on the sternum (middle of the chest) and one on the left side of the ribcage, thus allowing the electricity to go between the paddles and through the heart. The way Powder held his hands really wouldn't have worked.
Factual error: How could Brian get a cold after he was outside in the rain for a minute and was dried off right away?
Factual error: Many times in the film, the Nutcracker is shown to be standing at rest, but with its mouth open. It is at rest with nobody touching it, so its handle/lever would be in the down position by gravity. Yet the Nutcracker’s mouth is open. If a nutcracker is sitting at rest with the handle down, the mouth should be closed.
Factual error: When Calvin is invited to sit at the table with King Arthur and his daughters, as he is sitting down you can see that King Arthur is wearing a t-shirt under his robe.
Factual error: Set in 1955, Tom Holman enters a construction site with an orange warning sign. Prior to 1971, construction signs were yellow.
Factual error: Calamity Jane was not Pecos Bills love interest. According to legend Pecos Bill was married to Slue Foot Sue another tall tale. Whereas Calamity Jane was an actual historic figure.