But cutting interest rates as a first response to any distress in the financial sector has helped to blow bubbles in asset prices dotcom stocks in the late 1990s, house prices in the 2000s.

ECONOMIST: The credit crunch

Now here's the thing - blow enough bubbles, and some of them will run into each other.

BBC: The observable Universe and beyond

The team tried to blow up the bubbles chemically and through infrared technology, but decided neither was commercially viable.

FORBES: Magazine Article

Big problems, be they market bubbles or flawed levees, go ignored until they blow up.

FORBES: When Data Clashes with Common Sense