

Pi is a somewhat cryptic movie, filmed in black-and-white, about a mathematical genius who accidentally stumbles upon a 216-digit number that is the secret name of God according to Kabbalistic Jewish numerology.
While the protagonist drifts between surreal (God-like?) hallucinations, he is pursued by some kind of secret order of Jews who have been seeking out the number for some magical purpose.
In a climactic confrontation, a member of the order demands the number from him, and the genius reveals his belief that just having the number isn’t enough, justifying his belief by saying something like: “I’m sure you’ve tried every 216-digit number already!”
Now, the idea that some sect of Kabbalistic Jews have managed to try every single 216-digit number is ridiculous, and a mathematics genius should know that.
Do you know how many 216-digit numbers there are? Ten raised to the 216th power (10216), that’s how many.
Even if there were a billion people in this sect, and they each tried a billion different numbers every day, and had been doing so for a billion years, they’ve still only tried 3.6 × 1029 different numbers. Nowhere near all of them. Not even close.


Cube is a very good independent Canadian science-fiction movie that you should see if you haven’t already. With just one set and a total of seven actors, it efficiently tells a riveting and thought-provoking story in the best tradition of science fiction.
Alas, it too suffers from bad science (or, rather, mathematics) right near the climax.
As the characters wander through a deadly maze with only a series of cryptic three-digit numbers to guide them, the mathematics genius (a pre-Star Trek Nicole de Boer) realises that the key to safely navigating the maze lies in the prime factors of the three-digit numbers.
In a tense argument with another character, she shouts something like “No one can factor three-digit numbers. It’s impossible!”.
But… factoring a three-digit number isn’t difficult. In fact, it’s really easy.


At the climax of Alien Resurrection, an alien-hybrid Ripley is trapped on the ship with the terrifying monster that she gave birth to. Oh no, what will she do?!
So she slices her hand and flicks some of her acid blood against the ship’s window. (Well, “porthole” if you want to get nautical.) The blood dissolves a small hole in the window, and the harsh vacuum of space sucks everything out of the ship and into space, through the tiny hole! Including the monster!
How does a monster get sucked through a tiny hole? Well, you see, apparently the vacuum of space is so strong that it manages to extrude the monster through the hole, crushing his bones and squishing his organs until he fits. Pretty gruesome, eh?
Except that it’s bullshit. Do you know how much pressure difference would exist between the inside of the ship and the vacuum outside? One atmosphere. That’s about 1000 hPa, or 10 meters of water. I could put my hand over that hole, and it wouldn’t even hurt. My vacuum cleaner has more suction than that.