Continuity mistake: After the spaghetti twister, Flint puts on his lab coat in the elevator and you can see he has his tuxedo shirt on. Then during the building montage, it's a blue shirt, then changes back to the tuxedo shirt when he turns on the car. Also, during the building, the design on the blue shirt disappears.
Continuity mistake: When it's Cal's birthday, in the first shot of the ice cream truck thing, look at the children on top of it. They all are facing different directions. When you see the close up of the ice cream crushing them, they are all facing to the left.
Continuity mistake: When the giant fishbowl is launched into the air it's about 1/3 full of water. However, when it lands on Flint, it's completely dry. Even if most of the water got tossed out(which is unlikely), it should still be dripping pretty hard.
Continuity mistake: Before the Ice Cream Snow scene you see Cal wake up in his bedroom with his pajamas on, in the very next shot, when he sees the ice cream outside, he has his coat on.
Continuity mistake: In the scene where Flint has been persuaded by the Mayor to keep the machine running and is about to enter the food code, it changes to a shot showing his computer screen. in this shot, his computer is using Windows. But in the shot of the same screen where Flint's Father is about to send him the kill code, the computer is using a Mac OS. (00:45:35 - 01:08:05)
Continuity mistake: When Flint first discovers that it's raining food, in the shot where you hear Steve saying "Excited", Flint's jacket isn't moving at all in the wind. It does in the close-up.
Continuity mistake: On the dock, in the shot of the clouds, you can see about 100 hamburgers aimed for the dock (the middle). Yet at the end of the scene when Flint says, "It really works!" only 20 or so hamburgers are visible on the dock. The wind was moving south as seen by Flint's coat blowing in the breeze, so the wind couldn't have blown them in the water. Also, the fact that we see one more shot of the clouds and the burgers (with about 200 more aiming for the dock) makes this impossible.
Continuity mistake: When Flint, Steve, and Sam are on the dock watching the burgers fall, Flint reaches out and catches a burger. To his left (your right), one can see a busted cheeseburger. Later, when Flint yells,"it really works!" part of it has disappeared.
Continuity mistake: When Flint sneaks out of the shop, he runs past the ceremony and hides behind a pillar. Nothing can be seen of him, but when the camera pans to Flint, some of his hair can be seen peeking over the pillar.
Continuity mistake: Little Flint makes a drawing and sticks it between two of his posters. In the first shot the left corner is by the "M" of "Graham", but in the overhead view it's on the second A. (00:03:00)
Continuity mistake: When Flint's dad is looking out of the windows of the door to his shop as the food starts to rain down, the text and words on the door that were there earlier in the film have disappeared.
Continuity mistake: In the beginning no-one's shoes are untied, then it shows you they are, and after that they're tied again.
