2. Draw a boomerang shape on the card with a pen. Cut out the boomerang you've drawn.

Like a boomerang, the thing I loved came back to me.

We also see the phenomenon some of you may have boomerang kids these are boomerang alumni, where universities are actually reconnecting with alumni in helping them with jobs, sharing skills and retraining.

That is a shining example of how supporting separatism has a boomerang effect and ultimately winds up supporting terrorism.

Finally, once the crisis erupted, the fiscal consequences of bailing out too big to fail financial institutions contributed to rapid public debt unsustainability, which threatens to boomerang on the banking sector.

Even if countries avoid the immediate blow of a dollar collapse, they still have to watch for a boomerang effect. Exchange rates have a nasty habit of overshooting their equilibrium values, then knifing back on countries, especially those who have been spending too much based on inflated income valuations.

In normal times, any effort by a central bank to take short term interest rates too low for too long will boomerang. Short term market interest rates will fall, but, as investors begin to recognize the ultimate inflationary consequences of very loose monetary policy, longer term interest rates will rise.

Unlike United States Federal Reserve chairman Ben Bernanke, most emerging market central bankers are in no position to extend blank checks across their economies without a boomerang effect on interest rates and exchange rates. (We will see how investors judge the dollar once the smoke clears and the huge expansion of US money and debt becomes evident.)

As always, words are important, because they can easily be turned into weapons that boomerang on those who use them inappropriately. Wrong analogies have already led America to disaster in Iraq, which had nothing in common with Germany or Japan after World War II the parallel that some in the Bush administration used in arguing that democracy could be made to sprout in former dictatorships through occupation.