How To make action scenes

Greetings All!
I am currently working on an rpg and I need to make Finisher cutscenes. Like in Naruto Ultimate Ninja Storm, when you power up to the max and there is a scene where your character does their ultimate jutsu. Or in Mortal Kombat, where the “Finish Him” attack is done when the opponent is weak.
Please forgive me if I was too vague, I hope you can aid me.