10    9    8    7    6    5    4    3    2    1   Knock Knock! Who's there? UB40 UB40 who? UB40 today, Happy birthday! Knock Knock! Who's there? Sadie. Sadie who? Sadie ten times table twice! Knock Knock! Who's there? Randy. Randy who? Randy four minute mile in less than three! Knock Knock! Who's there? John. John who? John the Navy! More jokes sites: Comments - Not Pested Be the first who post comment for this joke! Post your comments here: Your Name     New | Popular | Top rated If you have any great jokes you want to share with everyone, submit them here >> Add Joke   Desktop Playmates! Download Now!   Your Favorite List:  Clear all Favorites