There's a key moment in Robert De Niro's new portrayal of Ponzi schemer Bernie Madoff, in The Wizard of Lies. Pronounced "made off", he infamously "made off" with billions in an estimated $64.8 billion scheme that collapsed in 2008, the largest fraud on record.
It's a scene where an investor's simple act of asking challenging questions keeps $400 million safe.
The film features dizzying amounts of money, and De Niro's character has just persuaded a single investor to put in $400m. To do that, the Ponzi operator plays "hard to get", making his scheme seem like an exclusive club where you pay to play. The investor falls for the ruse and shakes on the deal.
But the money never turns up. "What happened to that guy?" De Niro later asks his partner in crime (played sleazily by Hank Azaria). The promised $400m is money he desperately needs, as many other of his investors happen to be running for the door and pulling their money out.
Since a Ponzi scheme relies on new money coming in to pay existing investors (instead of real investment returns), the house of cards will collapse if it doesn't.