(Loved Trope) Character finally reveals their true power level

[u/Tannerknox]

John Wick - the viewer spends the first 25ish minutes just being told John Wick has an infamous past of being an assassin. Once the first home invasion happens, we see him fully unleash the Baba Yaga, completely annihilating a dozen unsuspecting assailants.

Rebel Ridge - the viewer learns early on that Terry Richmond is a Marine veteran who was never sent overseas for an initially unclear reason. Over half-an-hour into the movie he has a standoff with the town’s corrupt police chief. It’s revealed in this scene that he’s THE martial arts instructor for the Marines. He proceeds to disarm two police officers with extreme efficiency.

Naruto - Rock Lee is a character we’ve seen prove to be a capable fighter in a couple of episodes prior to his fight with Gaara, despite Rock not having any inherent Ninjutsu abilities. When his strikes can’t make it through Gaara’s automatic sand shields, Rock’s instructor, Guy, gives Rock permission to take off his leg weights. The bystanders watching the fight don’t understand how taking off some leg weights will give Rock an edge in the fight, but then when Rock drops them, they’re revealed to be hundreds, maybe thousands of pounds. This then reveals that Rock can move at super speed, and he can shockingly out maneuver Gaara’s first layer of shielding.

[u/Mr_Flibble_Lv2]

The Princess Bride, happens twice during the dual between Wesley and Indigo, it turns out the nether one is left handed! https://youtu.be/GT0TBWg3C3k?

[u/mouserbiped → u/Mr_Flibble_Lv2]

I would argue the later scene with Inigo Montoya--when he is charged by four guards and they all end up down in the blink of an eye--is yet another example of this trope. It's the first time we see him against a "normal" opponent in action and its impressive.

[u/BSF7011 → u/mouserbiped]

Read the book, he takes down the 4th guy before the first one even hits the floor