If you have a bunch of older style fillings ( not the new ones with plastic / enamel but silver) and you chew on tin foil you get a slight electric charge. And seeing that the nerve is still present under the filling it can be quite painful. I remember a girl who had a whole mouth full of fillings and did not know this would happen started to cry because it hurt so bad. ( granted I thought it was a hoot)
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'The most terrifying words in the English language are: I'm from the government and I'm here to help.' - Ronald Reagan
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