I stumbled across a dime at work with a bump in the center. It looks (at first glance) like it got hammered with a punch from one side, until you flip it over and the other side has a bump on it too. It appears to have an extra drop of metal in the center or some other error? I do not know the first thing about error coins, but I want to know if i have stumbled onto a big money dime. It has the print printed over the bump on both sides. The only way it could have a bump like that after being pressed is if it has had an injection with a syringe. That of course, is impossible. It looks like a mosquito bite on both sides of the dime. It really is a weird this.