Amnesia. Obvious, overused, improperly applied, and ruins the surprise of the inevitable Shock Reveal. "You're actually ______!" Saw that coming from the moment you used the word amnesia, thanks.
Time travel. Let's not spare one moment to think, actually THINK about the consequences of altering time. Let's just throw the phrase "time travel" in there and hope no one notices our story is composed entirely of continuity errors. (Side note, there's a neat little shoestring-budget movie called Primer you should watch if you want to see time travel done smartly)
Training montage. "I learned how to fight like a champ in only ten minutes!" This is excusable sometimes, for example in Kick-Ass 2 when Hit-Girl trains Dave. He still gets beaten, it just takes longer. Increase in skill is okay, becoming a master overnight is not.
Villain kills own henchmen. Smart bosses know that regularly terminating employees from a position will only ensure there will never be a capable employee in that position. This becomes a self-perpetuating cycle.
Deus Ex Machina. Doing this out of nowhere is the writer's way of saying he was too lazy to end the story intelligently.
Time travel. Let's not spare one moment to think, actually THINK about the consequences of altering time. Let's just throw the phrase "time travel" in there and hope no one notices our story is composed entirely of continuity errors. (Side note, there's a neat little shoestring-budget movie called Primer you should watch if you want to see time travel done smartly)
Training montage. "I learned how to fight like a champ in only ten minutes!" This is excusable sometimes, for example in Kick-Ass 2 when Hit-Girl trains Dave. He still gets beaten, it just takes longer. Increase in skill is okay, becoming a master overnight is not.
Villain kills own henchmen. Smart bosses know that regularly terminating employees from a position will only ensure there will never be a capable employee in that position. This becomes a self-perpetuating cycle.
Deus Ex Machina. Doing this out of nowhere is the writer's way of saying he was too lazy to end the story intelligently.