A Pickle On The Tree

There is a funny thing on our Christmas tree and I've never known why. Seriously. Every year I put it up, every year I wonder, every year I get the same response (from my Mother-in-Law): "It just goes there...that's all I know. But you have to put it up."
What is this funny thing? A hand-blown pickle. Yes. Green and lumpy and curved. A pickle. On our Christmas Tree. Why? I don't know but it seemed important and I'm all about letting people have the things that are important to them. Plus, I fi...