Deliberate mistake: After Sharpay falls into the pool, when Gabriella dives in it is an obvious stunt double for the actress. (00:16:40)
Deliberate mistake: After Burser blows the whistle to begin the hockey game, Verity knocks him out with her hockey stick. The next close-up of Miss Dickinson and Miss Cleaver is a flipped shot, note Miss Dickinson's hair part and Miss Cleaver's red patch on the wrong sleeve. (00:26:50)
Deliberate mistake: After Bert is shot in his car, Bobby pulls up beside him and just after Bobby shouts, "Pop, pull over!" the first time, the next tight close-up of Bobby's face is a flipped shot. Note his earring and the scar on his upper lip have switched sides. (01:17:00)
Deliberate mistake: When John crashes the car against the elevator room, the cables he and the woman hold on to are clean, when they should be greasy - thus allowing for them to hold safely.
Deliberate mistake: A stunt double for 47 got hurt on camera and yelled, very obviously. Right after the sword fight on the train the last man 47 is fighting continues the fight hand to hand under the tracks. Timothy Olyphants stunt double throws a punch and he grips his hand, yells and his face comes into screen for a moment. Next shot, Timothy Olyphant throwing his own punches.
Deliberate mistake: So right before the containment team seal up the window with the tarp, the SWAT is shown having police dogs. The virus (which came from a dog in the first place) can be transferred through saliva. The SWAT obviously overlooked the fact that the potentially infected people who might escape could be bitten by the dogs.
Deliberate mistake: In the housing block that Dave's house is in, the house numbers do not match - because In one shot of Claire walking past Dave's house, you can see that the house numbers are in the 1500's - one homes number is clearly 1516. However Dave's house number is 1958. However this is a deliberate mistake as the 1958 on Dave's house is a reference to when the Chipmunk fever was born. (00:23:50 - 00:32:35)
Deliberate mistake: Bender goes back in time to two minutes before Fry came back to the past. But if you time it, it was actually only 1 minute and 42 seconds.
Deliberate mistake: In the fire scene, Jon tries to catch Garfield from the chandelier at the main staircase. When Jon reaches out to grab Garfield, there is no rail on the stairs. It comes back in the very next shot & disappears again after Garfield says "Need a lift?"