Who Done It? (1956)

Continuity mistake: When Frankie punches Barakov, pushing him through the window, not only do you see the wires lifting him, but it is obvious that the inside of the building is a studio set as not only does the window get broken, but also the wall above it is torn. The wall is obviously made of paper and the scenery outside the building is a painted backdrop. And when the angle changes to outside the building, only the window is broken but the wall is intact.

Continuity mistake: During the car chase, when the beer tanker turns a sharp left corner there is an MG parked on the far side of the road. It has gone when the first of the chasing police cars take the same corner a few seconds later.

Visible crew/equipment: When Frankie punches Barakov, causing him to go through the window, the wires lifting him are visible.