Two fighters size each other up. They strike and parry, back and forth, then their swords lock together dramatically as they hurl snappy one-liners at each other. They shove and circle around, and split apart again, and the fight continues!
Except… nah. This is the Hollywood parry, something you’ll see in all the Star Wars movies at least. Like many things in Hollywood, it’s not a bad thing because it’s unrealistic (though it is that) but because it’s boring and stupidly overused.