Continuity mistake: In the kitchen with his aunt, Peter drinks from a mug. From the opposite angle the arm is lowered.
Continuity mistake: When Gwen is summoned by her parents to take a graduation family picture she says to Peter she'll work "all night long" and places her left hand on Peter's neck. When the shot changes her hand is gone. (00:16:30)
Continuity mistake: After graduation, when Peter kisses Gwen he places his hand on her cheek. When the shot changes the hand is gone. Also, her hair is covering her cheek or perfectly brushed depending on the angle. (00:16:25)
Continuity mistake: During graduation, after Peter tell his aunt "Ralph Waldo Emerson" he takes his hand to his hair. A shot later the hand is lowered. (00:15:15)
Continuity mistake: When Peter greets Aunt May during graduation a bang of hair over her left cheek appears/disappears randomly between shots. (00:15:00)
Continuity mistake: While confronting Rhino, before Spidey tosses the loudspeaker there are two cops to his right, and two other cops 4 meters behind. He throws the loudspeaker backwards, which in no way could've been grabbed by anyone. When the shot changes the cops on the right are magically behind Spidey, ready to catch the loudspeaker. Furthermore, its movement is totally unrealistic, revealing it's a CGI image with a fake movement to allow for the cop to grab it. (02:12:15)
Other mistake: When the little boy confronts Rhino, before Spidey arrives there's an aerial shot of a police car. There's not a single piece of glass inside despite the massive shooting and the shattering of all of its windows. (02:10:15)
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: 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: When Gwen is giving her speech, in the background are two boats passing. In the next shot they disappear. (00:12:50)
Continuity mistake: When Stan Lee is in the audience of the school ceremony, in the close up somebody is on his left but in the open view that person is gone. (00:14:20)
Continuity mistake: When Aunt May is about to do the laundry she gives Peter a sandwich with a large piece of lettuce in it, but in the following shots the lettuce disappears. (00:26:40)
Other mistake: Peter grabs with his web at super-high speed a mug full of scorching hot liquid that he uses to slapstick his way out of the Oscorp security stooges; somehow the cup clashed against his hand staying perfectly filled and unperturbed, but in the next shot the slightest bump spills coffee everywhere. (01:11:20)
Visible crew/equipment: We get a good view of the Oscorp corridors, in particular the one outside the closet where Gwen and Peter hide. They kiss and there's a lovely light seeping through the door's window; when they start making out and also quickly when they open the door you can actually see the big spotlight that emits those warm rays. (01:10:49)
Continuity mistake: When Gwen nearly falls off her own flats trying to avoid Oscorp's cartoon security, Peter grabs her. She clings to her and her mug hand is against his arm. She says "Hi!" in the next shot and her arm is lowered. (01:09:20)
Revealing mistake: Peter, scientific genius, needs to watch Youtube to understand how batteries work (and will need Gwen later to remind him the obvious relation between magnetism and electricity). As he watches the video, we can easily see it's a dummy page; it has 257,529 views, but two subscribers, and with 92 likes and 0 dislikes has still the bar that shows the like/dislike ratio that is about 4/5. The video is stupidly short, just 20 seconds that say nothing about the topic, and when it's 2 seconds from ending it still goes on off camera for about 6 seconds. (01:03:45)
Other mistake: When Peter looks up "Roosevelt hotel", the map result shows "Map data ©2013 Google." The movie was shot in 2013 but takes place in 2014. (01:01:30)
Revealing mistake: Electro grabs two cables and unleashes the power of dubstep making every billboard and sign fall. In the shot where the billboard for Mamma Mia and Jersey Boys begin to fall, several extras are running towards the camera and there are a few (like a woman to the left, wearing a white pantsuit and a light purple vest) that are laughing as they supposedly escape terrified. (00:58:30)
Continuity mistake: Enraged because Spidey is being filmed by cameras, and he is not (best villain motivation ever), Electro sends a wave of electricity towards him. Spidey jumps over police car 7703 (the one that he dented landing spine-first in it earlier) but the slow-motion sequence that follows takes place featuring car 1206. (00:56:40)
Continuity mistake: When Electro approaches the cables in Times Square, in the overhead shot we see that the person closest to the grate he targets is standing one row away from it. The following shots are consistent with that, even if we can see that there are more people. When he opens the grate in another angle, that person is standing right next to it. And when he digs his hands into the cables, some person with khaki pants is walking across the metal grids, but he wasn't there before. (00:51:35)
Answer: Peter could have contacted the police anonymously.
MasterOfAll