Brian Gary was trying to tell Todd & Susan the legend of the Christmas pickle!...Or as Brian called it: Tommy The Christmas Gherkin! They both thought he was full of it. It turns out he wasn't!According to an article by B. Francis Morlan  at here is how it goes:

The Christmas pickle is not really a pickle at all. It is a pickle-shaped ornament that is the last one hung on the tree on Christmas Eve. The first child to find the Christmas pickle gets an extra gift from Saint Nicholas. Or so the so-called legend goes.