1.When Sam finally got to say "On your left" back to Steve after hearing it so much in Winter Soldier.
2.When Tony ended his time as a hero with the same phrase that started it.
3.When Steve and Bucky said goodbye the same way they did before Bucky left for war in The First Avenger.
4.When Steve got tired of his own catchphrase.
5.When Morgan asked Happy for cheeseburgers at her dad's funeral, the same thing Tony asked for after escaping his abductors in the first Iron Man.
6.When Steve and Tony proved each other wrong years after their big argument in The Avengers.
7.When Thor referenced the iconic shawarma lunch from the Avengers mid-credits scene.
8.When Pepper wore the Rescue Armor, which was the same silvery blue as her gown in the first Iron Man movie.
9.When Loki brought back (or maybe originated) his spot-on Captain America impression.
10.When Steve almost re-created his iconic elevator fight from Winter Soldier until he realized the one thing he could have said to walk out without fighting.
11.When Thor actually took Thanos's advice when he killed him.
12.When Thor confirmed that he saw Steve was worthy enough to lift Mjolnir in Age of Ultron.
13.When Peter activated "Instant Kill" again, but on purpose this time.
14.When Tony's first arc reactor that Pepper turned into a keepsake in Iron Man appeared at his funeral.
15.When James D'Arcy returned to play Edwin Jarvis, Howard Stark's butler who we first met in Agent Carter.
16.When Harley, Tony's friend from Iron Man 3, attended Tony's funeral.
17.When T'Challa asked Clint for the gauntlet in Endgame, revealing that he actually did care when Clint introduced himself in Civil War.
18.When Steve and Peggy danced in Endgame to the same song that was playing on the stereo when Nick Fury broke into Steve’s apartment in Winter Soldier.
19.When Scott gave Hope a look after she called Steve "Cap" because she teased him throughout Ant-Man and the Wasp for doing the same thing.
20.When Wanda's visions from Age of Ultron all sort of came true.
21.When Steve finally said "Avengers, assemble" after teasing it in Age of Ultron.
22.And finally, when Stan Lee made his final cameo in the MCU, bringing with him some final advice for Tony and Steve.