I love listening to the Brian Lehrer on WNYC show every morning as I wake up. (I stream it). Yesterday Brian had John Hodgman on to judge listeners jokes. I quickly called the show and told the screener two of my knock knock jokes I made up when I was 7 or 8.
It's best to listen to the whole segment since Hodgman is hilarious, but if you want to skip ahead I appear after the 7:20 mark.