Revealing mistake: Crawling through a fire cave you can see propane bottles in the background several times.
Revealing mistake: In the POV shot from Thomas, capturing Bill and Ben puffing away from the water tower, Thomas seems to be off-centered from the tracks, making it seem like he is derailed.
Revealing mistake: During the plutonium heist, when the truck skids, tire marks from previous takes are visible on the pavement. (00:10:20)
Revealing mistake: When the master's gold falls into the water off his boat, several of the gold items can be seen floating, something no gold item should. (00:40:00)