Derek Posted on January 25, 2015January 25, 2007 by admin Knock Knock. Who’s there? Derek. Derek who? I derek you to jump off the edge. Spread the love Related posts: Knock KnockWho’s there?Scold!Scold who?Scold outside! Knock Knock 47 Knock KnockWho’s there?Grammar!Grammar who!Grammar crackers. Knock Knock 113