Other mistake: The first shot of the movie is an ominous zoom-out from Richard Parker's watch, a top quality Swiss watch...although, it shows that it's 5:42, and the timestamp in the security cameras is 21:05. (00:00:55 - 00:01:25)
Continuity mistake: In the opening scene, Richard Parker hears his son Peter calling his name, and he rushes to check on him, opening the door to his study who has been ransacked by someone. That's the same scene as the first movie, only it is absolutely not the same; not only the position of the items in the room is different (and so also the lighting, since lamps were amongst those objects) but Campbell Scott opens the door using both hands instead of just his left (check out the same timecode of the first movie). (00:02:10)
Continuity mistake: When Mary and Richard Parker says goodbye to their son, the scene is similar but also different from the previous movie; she delivers her line with a calmer voice and doesn't stroke his hair in the jittery nervous way of the original. The dad's farewell to Peter is also longer and here they touch hands. (00:02:25)
Continuity mistake: Mary is touching Peter's face when her husband takes her away. She bends her arm to her chest, but in the following shot it's back next to Peter's neck and she is repeating the previous movement. (00:02:25)
Continuity mistake: On the plane, when Peter's father holds the mother's hand she has a small red notebook next to her. When the angle changes it has swapped to a huge red book. (00:03:15)
Continuity mistake: When the fake pilot stands up to punch Peter's father his parachute disappears. (00:05:30)
Revealing mistake: In the airplane fight, heavy objects (and people) get sucked out of the door once the cabin is depressurizing, but the cables and the mask tubes on Richard's side stay softly curled and unmoving throughout the scene. (00:06:10)
Continuity mistake: When Aleksei Sytsevich says his own name and cackles, we see the other marauders jumping on the Oscorp truck. There's a shot from a crossroad with a pedestrian wearing a grey suit that looks at the police car in pursuit, and at the street corner there's a woman by the garbage bin; the camera angle changes and the people at that corner have changed. (00:08:10)
Visible crew/equipment: In the scene when Spider-Man is chasing a truck stealing OsCorp's plutonium vials, the truck, driven by Aleksei Sytsevich, crushes one of the police cars. The scene cuts to the left side of the truck crushing the police car. A moment later, it cuts to another angle. Here you can see the camera equipment on the left side of the truck. (00:08:20)
Factual error: A helpful automated voice from Oscorp informs the robbers that "Plutonium-838 is a radioactive material and is highly explosive." No it's not. It is radioactive obviously, but it is not some volatile explosive. (00:09:10)
Continuity mistake: The very first time we see Max Dillon, he's carrying literal blueprints around. He mumbles "There's more room on the sidewalk"; notice behind him just after he says "Excuse me", a man with white hair and beard, smartly dressed with a handkerchief in his breast pocket. The shot changes and the same extra is coming from the opposite direction in front of Jamie Foxx. (00:09:15)
Other mistake: When Max picks up the blueprints scattered in the street, behind him lingers the view of a building with the banner for the 2013 NFL Draft, including fully visible the date "April 25-27." Since it happens on graduation day for Peter, it'd have to be an ad a month or two old...and a year old, because it's established that the movie takes place in 2014. (00:09:25)
Continuity mistake: After Spiderman saves Max and gives him the blueprints, Max's hairstyle keeps changing between shots, several shots before Spidey fixes his hair. (00:09:50)
Continuity mistake: When Spidey wastes 20 seconds of valuable time for the ever important task of fixing Max's combover, he says "Lick that", and in the next shot Max does not lick 'that', but 'the other one'; Spidey put in front of him his left hand but the reverse shot shows Jamie Foxx's tonguing Spidey's right phalanges. (00:10:00)
Continuity mistake: After Spidey fixes Sam's hair he puts his hands on his ears. When the angle changes the hands are gone. (00:10:05)
Revealing mistake: During the plutonium heist, when the truck skids, tire marks from previous takes are visible on the pavement. (00:10:20)
Continuity mistake: Aleksei Sytsevich abruptly stops the truck creating a pile-up of police cars. There's a close-up of a container of plutonium falling off an otherwise full rack, but the following part of the scene shows the rack half empty, and in any case the one contained that fell in the close-up was the bottom left one, in the rest of the scene the one missing from that column is the top left one. (00:10:25)
Continuity mistake: In the second part of the chase, Sytsevich drives off leaving all the police behind and all the plutonium falls from the rack except the second container from the left in the top row. During Spider-man's antics in the back of the truck you can see the container about to fall (and eventually falling) from the third hole from the left. (00:10:50)
Continuity mistake: Gwen's phone call;Spidey holds the plutonium in a different position in each shot - at the end he even just has it standing perfectly vertical on its own. After the first two shots -when his arm goes from behind the grill to under his chin - we are not talking about consecutive shots anymore and the camera cuts away each time for over two seconds so it is technically possible he'd change position every time, but it randomly goes from above the grill, to behind, front, and perched on it. (00:11:25)
Other mistake: We see a good view of Spiderman's suit during his acrobatics in the air at the beginning of the movie; it's skin-tight and has no compartment or belt. However, when Gwen calls, Spidey reaches behind his back and pulls his phone out. (00:11:30)
Answer: Peter could have webbed him up and called the police anonymously.
MasterOfAll
Very likely. However, there was a deleted scene in which Peter, out of anger over Gwen's death, almost beats Harry to death.
Yes. We also see Goblin getting knocked out when all hell breaks loose, and the gears all break apart. Chances are, Peter just webbed him up. (Although, as the other response says, he also got beaten up in a deleted scene.)
TedStixon