Revealing mistake: The captain's arm that was removed can be seen wrapped in a green screen editing sleeve when he is in the hospital. (00:39:55)
Revealing mistake: When Johnny shows up to Cobra Kai dojo and all the kids are there. In the video playback they show on the phone you can see Miguel didn't land the kick, and the kid just fell down. (00:28:18)
Revealing mistake: In the sequence with Zeus and Apollo attacking the intruders, the padding of the jackets' arms they are sinking their teeth into is very noticeable. (00:32:15)
Revealing mistake: When the assistant gets thrown into the wall by the brain controlled Gar-tiger, there are already marks on the point of impact, from previous takes.
Revealing mistake: When Mitsuhashi and Ito meet on the first day of school, the clock in the classroom never advances from the 8:20 position despite the scene taking place in a span longer than one minute. (00:04:45 - 00:06:08)
Revealing mistake: When Ms. Haman is shot by the soldiers, the moment that the gunshot that hits her is heard, and she is shot, there is already a massive, thick blood stain on her dress from where she is bleeding from. No gunshot wound on the planet can create an amount of blood that massive or thick in an instant. The blood stain was likely applied to her dress before filming the shot. (01:17:52)
Revealing mistake: Driving through Paris, the speedometer of the Police BMW car is at 0kph (rev counter shows car at tick-over).