At about 38-1/2 minutes, Spake takes a shot on the pool table. The red 3 or 7 ball is at the side pocket he's among at. When the camera angle changes, it's a striped 10 ball. Back to the scene, the red ball is back at the side pocket.
The kid is wearing the stolen watch on his right hand but that makes it easy to spot when Barnaby shakes hands with him.