In The First Avenger, the scrawny, bullied Steve Rogers is attacked and beaten up in a back alley but he still stands his ground, remarking that he "can do this all day.” In Civil War, he finds himself in a similar position as Iron Man takes him down and he again reiterates that he could "do this all day." And in both occasions, it is Bucky Barnes who comes to his rescue. The Redditor - clearly with a lot of time on his hand - made an interesting comparison between two scenes from the movies. I didn't see the parallels in Bucky grabbing Steve's attacker until just yesterday from r/marvelstudios In Civil War, Captain America fights for superheroes to govern themselves and goes head to head with his former ally, Robert Downey Jr.’s Iron Man, who wants the heroes to be governed by the United Nations. The serum transforms him into a strong and able soldier named Captain America, and he leads the US Army in its fight against the Nazis. The First Avenger finds a scrawny, bullied orphan named Steve Rogers, who is chosen for a top secret government project during World War II in which he becomes a test subject for a super serum.
Recently, a Redditor spotted a touching parallel between Captain America: The First Avenger and Captain America: Civil War. Marvel Cinematic Universe is fascinating and fun not just because it's an interconnected universe of several blockbuster franchises, endearing superheroes and interlinked storylines it is also because of its cute little callbacks and Easter Eggs hidden in many of these films.