A vivid example of circular investments is shown in the film "Useful Minerals" (1999), the scheme is revealed in a scene where the main character draws on a napkin how one company controls the entire chain: it mines diamonds in Africa, sells them to itself at a reduced price, insures them with its own insurance company, and then artificially creates losses (e.g., "sinking" a ship) to receive an insurance payout from itself. Thus, money circulates in a closed loop, creating the appearance of a legitimate business, while real profit arises from manipulations between its own subsidiaries.