What Google Trends terms should you watch to know about panic?

This Business Insider article is trying to watch for a coming by following these terms on Google Trends (click through and you can play with the terms yourself):

the depression, guns, deflation, fractional reserve, fiat currency

How about this set? debt, gold, prices, eurozone, eurusd

See the spikes in our times? Would any of those be a good indicator that the push will come to shove?

And what would you propose as a good Google Trends keyword set to know when the public is getting seriously panicked?