Revealing mistake: At the start of the movie, when the axe gang leader is finishing off the now-one-legged man, you can see in his shadow that he's not hitting the man. Also, if he did hit, you should think that he'd have to pull out the axe blade again, but again in the shadow's arm movement, you see him move his arm in a circular movement, not hitting the victim.
Kung Fu Hustle (2004)
1 revealing mistake
Directed by: Stephen Chow
Starring: Stephen Chow, Qiu Yuen, Shengyi Huang, Wah Yuen, Xiaogang Feng, Zhihua Dong
Visible crew/equipment: When Sing is about to fight the beast, the camera turns 360 degrees around Sing. When it spins, you can see a crew member crouched in the bottom right hand corner.
Trivia: Foreshadow: There's bunch of frogs/toads outside the Beasts' cell, later in the film he fights "Toad Style."