When Meganulon attacks the young woman, a pair of slime covered headphones, a beer can, and a plastic cup are on the ground.
The woman's shoes fall off of her feet and onto the ground when Meganulon drags her behind a barrier, but in the next shot, only the headphones, beer can, and plastic cup are seen dripping with slime and the woman's shoes are nowhere to be found.
The first use of Dimension Tide the singularity Godzilla looks straight up at it.Even though it is a direct hit then after detonation it is revealed he buried himself.
Naturally, the explanation given for the existence of Megaguirus is completely unscientific. Though there existed an ancient insect called Meganeura (on which the titular monster was based), it never grew to the size of the gigantic creature that we see in the movie. In reality, its wingspan was less than three feet.
When Megaguirus shows itself for the first time, the strings holding it up, and the strings its flying on are clearly visible.
When Kiriko is riding on Godzilla's back in the ocean, there is a shot panning out from her to reveal Godzilla's face. As the camera is panning out, the lighting on her never changes even when water is splashing in her direction.
When Godzilla comes ashore in Tokyo, the elevated roadway he crashes through is clearly made of gray-painted wood.
When the Meganulon is about to attack the girl, you can see a crewman holding up the
Meganulon prop as it's lunging towards the camera. This mistake is very brief but becomes
clear when you know where to look.
Dr. Yoshizawa says that they to need to shrink the black hole to "two meters" before firing it into Godzilla. A black hole that size would have the mass of Jupitar (about 2 x 10 to the 27th kg or about the same as 318 Earths) and would completely destroy the planet (and probably mess up the entire solar system).