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Yes. In my area, there is a popular saying: The dog that barks does not bite. But that quite one does not miss a bite.

It applies to humans sometimes.

That's a good example I have never heard anything like that type of phase good one!

Usually these people can end up becoming your worst nightmare if you get them off your back.

I'm one of those quiet ones that is always misunderstood and underestimated but not anymore.