When the Vulture's weapon blasts the ferry in half and Peter struggles to hold it together, Tony does one hell of an entrance in the nick of time. Peter is using dozens of weblines and failing, then on-cue several repulsor boosters fly into the screen and stabilize the ship. The scene then shifts to a window, where Iron Man is in a brand-new armor, reminiscent of the one from the Ultimate comics, thus providing a double Mythology Gag as the scene reminds comic fans of the time when he pushed away a Chitauri ship.
This needs to be elaborated upon to show just how awesome it is. Peter spends one hell of a time trying to tie his web to every hard support of the ferry in an attempt to hold it together. It seems to have worked, but it left Peter exhausted. Then Karen informed him that he missed one support of the ferry, and it leads to his webs breaking apart and causing the ferry to sink again. Peter then desperately tries to hold the whole thing together by himself a-la Tobey-Spidey holding the runaway train in Spider-Man 2. Suddenly, Iron Man himself and his boosters come out of nowhere and put the ship back together and weld the damaged parts, all done effortlessly in less than a minute. It shows how much difference there is between a veteran superhero like Iron Man and a newbie still learning the ropes like Spidey in dealing with dangerous situations. And Iron Man held the ship together at first before without the extra rocket boosters at first.
Web Grenades, i.e. delayed launch webbing. You stick the web ball somewhere and it webs up someone/something a few seconds later.
The emblem on Spidey's chest can also turn into a small mechanical drone! Even Peter In-Universe thinks it's cool.
Other cool things from the Stark-made Spider-suit: A.I. assistance, heads-up displays, 576 possible web shooter combinationsnote This is probably less impressive as it sounds, as 576=242, so if he can allocate different web shooters to each hand, he only has 24 different web types, web-wings under his arms and a parachute.
And it's set to the iconic theme of Spidey's own 1960's TV show. He is so far the only Marvel hero to get his own theme song in the opening.
The trailers also show glimpses of The Shocker, now armed with a powered gauntlet which he uses to punch Spider-Man into a school bus and send it sliding! Apparently they decided to stop portraying him as a joke.
Not to mention, producer Eric Carroll revealed in an interview that the gauntlets are actually modified and enhanced versions of Crossbones's gauntlets from Civil War, which packs a bigger punch than Crossbones's did, but also shocks/electrocutes the victim, giving a new spin on Shocker's name. And it's also a CMOA for the Evil Genius who did the upgrades.
Spider-Man saving his classmates from being crushed in a falling elevator by jumping off the Washington Monument over a police helicopter and using it to gain momentum and smash through the window and catching the elevator with his web by having it bounce off the elevator debris.
It wasn't just that he managed to pull off such a hare-brained nigh suicidal stunt, but that he had the courage to make the attempt. Unlike most other iterations of Spider-Man, this one isn't immune to vertigo or fear of heights, and Karen makes it explicitly clear that a single misstep would be certain death. When Peter quips "I'm gonna die!" just before leaping, it isn't hyperbole; it's honest fear. Yet he still makes a jump he dosn't think he can land, using tricks he's never tested, all for a desperate plan he has no confidence in succeeding. Actually saving the day was icing on the cake; the real victory was having the guts to try.
Adrian Toomes gets one in one of the film's more subtle scenes. As he drives Peter and his daughter to the Homecoming dance, he's able to put various details together — recognizing Peter's voice and hearing from Liz about how he's always missing from decathlon meetings — that Peter is Spider-Man. All done over the course of a single car ride.Awesome by Analysis at its finest.
He also puts together a workable plan with multiple contingencies to stop Spidey by the time they reach the dance, and integrates it into his existing plan to rob Tony. It nearly works, too.
Ned helping Peter near the end as he fights Shocker by firing Peter's detached web shooter at Shocker and giving Peter an opening to take him down.
The reenactment of "If This Be My Destiny...!" from Amazing Spider-Man #33 where Peter musters all of his super strength to lift debris off his back.
Peter: C'mon, Peter! Come on, Spider-Man!
Even better while Peter is ready to give up, he sees the mask and remembers Stark's words of not being anything without the suit and it is in that moment that Peter proves that it isn't the suit or even the powers that make Spider-Man great but the heart, soul, determination and intelligence of Peter Parker beneath the mask. Bonus points for Peter doing it without his mask on.
Sure it was only with the aid of a puddle and reflection, but they finally pulled off the iconic image of the face that is half-Peter, half-Spider-Man.
Working without the Stark suit and with only Ned acting as Mission Control in the school computer lab briefly, Spider-Man manages to stop Vulture from making off with the plane holding all of the Avengers' tech and defeat him in battle once the plane crashes. Then to top it all off, he decides to Save the Villain from dying in the rubble and flames and web him up so the police can arrest him instead.
How about the ending? Tony is ready to make Peter an official Avenger in front of a live press conference. Peter turns him down, willing to stay close to the ground - but then assumes it must have been a Secret Test of Character that he passed which Tony and Happy confirm... Then we see the reporters through the door and Pepper asking where Peter was, showing Tony seriously was going to have him join the team right then and there.
The fact that the final battle on the beach becomes less about beating Toomes and more about saving him once Peter realizes that the damaged suit will kill him is a great, unusual twist for a superhero climactic fight. Major bonus points for Peter running into the flaming wreckage of a plane crash to save a man who was just about to eviscerate him.
During the first stinger scene, Toomes runs into Gargan in prison and Gargan suggests using his contacts on the outside to kill Spider-Man since he heard a rumor that Toomes knows who he really is. While Toomes lied that he doesn't know Spider-Man's secret identity this is basically a tease that the MCU will get its own version of the Sinister Six soon.
Tony actually revealing that he is present in the flesh by folding back the helmet of his current Iron Man armor and stepping out of it after Peter "screws the pooch" while trying to save the Ferry State 11, as a response to Peter angrily stating that if Tony cared he would have actually been present the first time around.
As sad as Tony scolding Peter is, and while he's not the best at being a mentor, it's also a sign of Tony's Character Development across his previous MCU films. "If you're nothing without this suit, then you shouldn't have it." stands out, as Tony teaches Peter the same lesson he learned in Iron Man 3.
In the movie's prologue, Toomes managing to get away with slugging a federal agent in the face after the jackass decides to make fun of Toomes and his men losing a very important job (clearing up the battle debris from the Battle of New York). And then turning them stealing his job out from under him by modifying and selling off the same tech that the Department for Damage Control is supposed to be cleaning up.