Hyperinflation ain't gonna happen. The only "real" country that has ever had hyperinflation is France, three times. And one of those was the Assignant (followed by the Mandat) during the Revolution, and so probably doesn't count. The other two times were the Mississippi Bubble that destroyed the Livre (when people really did not understand what was going on) and 1926. The Continental during the American Revolution did not deflate quickly enough to qualify, but again Revolution. The Confederate Dollar doesn't count since again the CSA was not a "real" country. Short of your country being invaded or a revolution dissolving the state, hyperinflation is hard to achieve in a functioning society. People forget that the famous period of the German hyperinflation was the occupation of the Ruhr by France and Belgium. At the time, 50% of the GDP of Germany passed through the Ruhr Valley at some point during production, so half of the economy shut down for like 9 months.
In the US, we changed the definition of inflation in 1994, switching from a true CPI (fixed basket) calculation to a GDP deflater. Think about a world in which you consume bananas, apples and oranges. Let's say everyday you eat 2 bananas, one apple (to keep the doctor away) and three oranges. One day the price of bananas triples, so you stop eating bananas and eat more oranges. The new way looks at what you buy rather than just looking at a fixed basket of stuff. However, I'm told that if you go back to the old way of calculating inflation, then we are at 1970s levels. I do know that the first half of 2008 equaled the first half of 1980, and supposedly, we are getting back to those levels. Having just gone grocery shopping, I know that the BLS's published statistics are either total bullshit or utterly detached from reality. One of the other wonderful statistical quirks of the system is that house prices aren't in inflation, but "imputed rent" is. So how much it costs to buy your house is not in inflation, but how much it would cost to rent your house is. Therefore, if you have overly low interest rates that spawn a credit driven housing boom and the homeownership rate heads for 70%, then the hundreds of thousands of newly empty apartments drive inflation down.