When the little boy is thrown into the water, and Cap is ready to stop to rescue the kid, and the kid yells out, "Don't worry, I can swim!"

Stuff like that, that earnest to the point of corny tone, is, like, borderline impossible to strike perfectly in the cinematic medium. This movie wasn't as "aw shucks" as the first one, but it still has some wonderful moments close to that, such as the aforementioned spoiler scene, and the scene where Cap is spied at the museum and agrees not to tell anyone.