Kick-Ass 2

Audio problem: When Mindy uncovers her motorcycle and starts it for the first time in the film, the engine sound suggests that the motorcycle (which appears to be a Ducati 1199 Panigale) has a 4-cylinder engine (identifiable by the distinct smooth car-like sound with higher pitch). The Ducati Panigale has a 2-cylinder engine, which should be sounding a lot rougher. But in the end scene where Mindy drops Dave at his house with her motorbike, it makes a completely different sound, which is how the 2-cylinder bike sounds in reality. (00:14:10 - 01:34:25)

Continuity mistake: When Mother Russia tears off the car door and uses it as a shield, she then throws the door at another police officer and there are no bullet holes/dents visible.

Firewall

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Mindy Macready: You don't have to be a bad-ass to be a superhero. You just have to be brave.

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Trivia: When Dave flashes back to his Dad caring for him as a kid, his Dad is putting up a poster for a comic called Superior, which is another comic series created by Mark Millar (creator of Kick Ass), currently in development for a movie as well.

Quinny

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