and you've also probably banged on that cake pan. I have...
(from Wiki)
One famous fan is Fred Schuman, popularly known as "Freddy Sez". For over 50 years he has come to Yankees' home games with a baseball cap, a Yankees' jersey (which on the back bears his own name) and a cake pan with a shamrock painted on it which is connected to a sign inscribed with words of encouragement for the home team. The sign changes every game (but always features the prefix "Freddy Sez") and Freddy carries a metal spoon with him encouraging fans to bang the pan for good luck as he walks through the crowd throughout the game. READ MORE