Visible crew/equipment: When the hearse drives in reverse, two filming crew members plus the camera are reflected on the glass.
Revealing mistake: When the Klansman is killed at the funeral, the bullet-hit squib under his robe protrudes.
Revealing mistake: When the hearse is driving with no control during the funeral, a car avoids the crash by making a quick turn. Skid marks from previous takes are visible on the road.
Revealing mistake: When Butt falls behind the suitcases, a mattress to soften the fall is visible.
