I have made a very important discovery. Modern pennies don't ring when you flip them into the air. In fact, every penny made after 1984 is a fake. They just emit a dull clunk and then damp out. But pennies from 1981 or earlier make a delightful ringing sound. I just thought you should know. Because, if you're like me, and your entertainment relies on the quality of a pure ringing sound as you're walking down the hall, this could be important. Yesterday I had a nice old penny, but today it was from 2004: gross.