Visible crew/equipment: When Calamity and Katie are driving back on the stage they are attacked by Indians before they arrive in town. Calamity starts shooting at them from behind the large suitcase with Adellaid Adams wrote on it. Initially there is no mark on the suitcase but halfway through the scene a black mark appears below the D of Adellaid and if you look very closely you can see the piece of string along which the arrow is shot.
Visible crew/equipment: When Fred Astaire is dancing in the train station, there is one shot as the camera pulls back where you can see the equipment/crew shadow on one of the public machines there.