A company called Knight Capital started losing literally $10 million [£6.4m] a minute when they switched on a computer program for trading on the New York stock exchange.

(They ended up losing $440 million [£281m], and their shares have now lost 71pc of their value since the error.  The result is the trading company is awaiting a rescue package from a rival firm.  Someone should make a film of the whole thing, and call it “When algorithms collide”.)