Right from the very beginning after winning a carnival game, Adrian gave his prize to Victoria, who really wanted to win. This makes their deaths by Pennywise all the more heartbreaking.
Adrian: Hey, little girl, you want this chicken? (gives it to her) Thanks for letting me win.
Mike keeps a picture of his grandfather on his desk. As stern as the man was, Mike clearly loved him.
While its intended to be a funny moment, the scene where Eddie says I love you, mommy to his wife is actually quite charming to hear, especially since the last time we saw Eddie with his mother was when he disowned her for lying to him about being sick. It really goes to show that, even after the lies, he still loves Sonia Kaspbrak a lot.
The Losers Club reunion. They dont really remember being friends or why theyre all together again, but in the span of just a few hours, they fall back quite easily into the rhythm of having fun and laughing together, just like they were kids.
Examples include Eddie remembering how he patched Ben's wound up on the first day the Losers met him, Eddie and Richie arm-wrestling, and Richie and Beverly seemingly going in for a romantic kiss ... before Beverly shoves food into his open mouth, much to the group's laughter.
The music playing during that scene, aptly entitled "Losers Reunited," helps a lot, too. It perfectly captures the feeling of seeing your best friends after being away from each other for so long, and yet, still being able to laugh and joke around as if no time had passed at all.
After dinner, when Mike begins to tell the Losers the real reason why he brought them back together, the others repeatedly try to cut him off. Despite his own fear, Ben shushes them every time, insisting that they hear Mike out first and let him speak.
During the chaos of having Pennywise appear in the Chinese restaurant in the form of the demonic fortune cookies, Eddie is visibly panicking and cowering in the corner. Instead of giving him shit about it, considering they're all adults now instead of pre-teen kids, Ben takes it upon himself to hold onto Eddie and shield him while Mike tries to smash the monsters to bits. The extra heartwarming bit? Ben is obviously just as unnerved as all of them, but he keeps enough presence of mind about to keep shoving Eddie behind him, arms extended and ready to bat the monsters away should they come near him and one of his best friends.
If one listens closely, you can hear Richie calling for Eddie all the way across the room, and whenever the camera cuts back to him, he's got am extremely worried expression on his face, the only thing stopping him from running over to Eddie being the monsters attacking them. One True Love, indeed.
Seeing the Losers reminiscing in the old clubhouse Ben made as a boy. Anybody whos ever taken a trip down memory lane to their favorite childhood places can relate to the feeling of nostalgia rushing through them. Cutting back between the child and adult actors also helps.
A brief flashback scene shows all the Losers piling into a photo booth to take silly pictures together, in one of the few instances where we see them getting to just have fun and act like normal kids. Twenty-seven years later, it's shown that Mike still has the strip of photos and uses it as the bookmark for the journal he'd been using to keep tabs on any Pennywise-related incidents. It's not too far of a stretch to think that every time he felt like giving up, he'd only have to take one look at his friends' goofy faces and gain strength all over again.
Bill's joy when he rides Silver after buying it back, and his flashback to riding double with Beverly when they were kids. Him cheering like a child when he finally gets the hang of it again only adds to the tenderness.
Bill: Hi Ho, Silver!
When Bill encounters Dean after his experience with IT, he actively warns the kid to move out of Derry as soon as possible after the kid says hes been hearing voices in the tub and even pulls him away from the open sewer hole where Georgie died immediately after seeing him. Even after 27 years, Bill still kept his big brother mentality and is willing to help any other kid struggling with IT. Unfortunately it doesnt end well for either of them.
It's lost in the gravity of the scene, but Ben patching up Mike's hurt wrist while he's on the phone with Bill - who is about to go on a Roaring Rampage of Revenge, due to having just witnessed Dean's death - is quite sweet as well.
Bill, suffering a Despair Event Horizon after Dean's death, vows to kill IT himself and rushes to the Neibolt House alone, only to be stopped by the other Losers before he goes in, and we get the following line, cementing the Losers' status as True Companions:
Beverly: We didn't let you do it alone back then. We're not letting you now.
During the Ritual of Chüd when the losers burn their tokens, Eddie puts in one of the shower caps Stan brought to them when they first built the clubhouse. Its nice to see that even during their final battle, they still acknowledge that Stanley is with them in spirit.
Richie giving Eddie a pep talk after the latter thinks he's too weak to go down into IT's lair with them, seeing as he'd frozen up in the kitchen earlier, which almost resulted in Richie dying. Despite this fact, Richie still takes the time to firmly, yet gently tell Eddie that he isn't The Load, that it's perfectly fine to feel scared, and even manages to get a jibe in on Eddie's wife while he's at it. Classic Richie Tozier indeed.
Beverly handing Eddie the same iron fence post she'd used to stab Pennywise 27 years ago in order to boost his courage, followed by her reassuring him in the softest, gentlest tone she can muster. The following exchange solidifies the trope further:
Beverly: Here, take it. This kills monsters.
Beverly: If you believe it does.
Eddie: (nods gratefully) Thanks, Bev.
(The two exchange fond smiles.)
It's even more heartwarming when you realize that that exact same fence post was what enabled Eddie to stab and weaken Pennywise when he had Richie trapped in IT's Deadlights, therefore saving the man who, despite him not knowing, had loved him deeply since they were kids.
When Beverly gets dragged underwater by Pennywise in his demonic Mrs. Kersh form, nearly all the boys jump into the water at once, no questions asked.
Eddie, who had reached shore first, is left alone after the others go back to save Beverly. He's clearly unnerved with every passing second, repeatedly muttering that he just wants to go home, that he's scared, but as soon as they resurface, Eddie visibly breathes a huge sigh of relief, muttering "Oh, thank God!" under his breath when he sees they're all okay.
Beverly and Ben by the climax. Ben's love for Bev gives them the strength to escape Pennywise's trap, and after defeating Pennywise, they truly embrace their feelings for one another, which Bill calmly and maturely accepts. By the end, they're living together, free and happy.
What helps sell this and makes it even more heartwarming is how their lives turned out before they reunited. Ben became a luxurious millionaire who has nobody to share his love with and missed out on the only girl who ever cared for him. Meanwhile, Bev ended up marrying an abusive jerk whos just as controlling, demanding, and sex-obsessed as her father. Even without the torment IT put them through in the film, the fact that they finally settled down together is nice to see. Earn Your Happy Ending indeed.
At the end of the film, it's also notable that when Ben asks Beverly how she slept the previous night, she gives him a dazzling smile and says that she had a beautiful dream. It's a lovely change from the Beverly who has been plagued by nothing but nightmares for the last twenty-seven years.
Unlike the book, The Losers Club doesn't forget one another. They remain active friends for the rest of their lives.
Also unlike the book, Stan's suicide is not an act of despair and terror, but pure love. Stan knows he's too scared to go back to Derry and face Pennywise again, and without all of them as one, Pennywise will win. So he removes himself from the board, knowing they'll carry his memory into battle with them, and he'll be there in spirit. He leaves letters for them in case of their victory, affirming his love of them and his belief in their strength.
It's a blink-and-you'll-miss-it moment, but as he writes his letters for the Losers, you can see an envelope addressed to his wife, Patty, as well. Before Mike's phone call, the two had been chatting happily about taking a trip to Buenos Aires, and judging from the way Patty can barely talk about his passing on the phone with Bev, it's incredibly obvious that they loved each other very much.
Although it's a Tearjerker as well, Richie going back to the Kissing Bridge and re-carving the 'R + E' graffiti he had done as a boy. The teary smile he gives as he sees their names sitting together will melt even the coldest of hearts.
As he does this, Stan reads his letter to the Losers via voice-over. It probably isn't a coincidence that as Richie carves, Stan's voice says "Be who you wanna be. Be proud."
Bill and Mike exchanging "I love you"'s before ending their phone call, and Mike telling Bill that should he ever need anything, he can always give Mike a call. Bill accepts the offer with the brightest smile we've seen him give since the movie began.
The hopeful smile on Mike's face as he sets out on a new adventure, free to leave Derry at last and "see the sun" like he'd always wanted to as a child.
Like in the book, after defeating IT, the Losers wander back into downtown Derry, where they see their reflections in a department store window: the whole gang, as children, looking at them with pride and happiness. And among them are Eddie and Stan, giving their final farewell. The movie really stressed the beauty that their childhoods and their friendship really were.
The music played over the quarry scene leading to the mirror scene mentioned above is entitled Nothing Lasts Forever, and re-uses some of the themes from the first film, notably Beverly and Blood Oath. It gives the viewer a sense of longing for the good old days, for the time when the Losers were still together, but at the same time, you also get the feeling that all five of them - no matter what happens - are ready to start moving forward and face whatever else life has to offer, especially now that they've got each other in their lives again.