Not so funny on the internet, but try these on your friends. These are 2 options for knock knock jokes that only really work in person. **1:** * You: Knock knock! * Them: Who's there? * You: Interrupting cow. * Them: Interrupting- * You: MOOO!! (Make sure you interrupt them) **2:** * You: I have a great knock knock joke for you. * Them: Okay. * You: Okay so you start it. * Them: Knock knock! * You: Who's there? * Them: ....uhh Enjoy!