CARL:  Knock, knock.   ME:  Who's there?   CARL:  Donut.   ME:  Donut who?   CARL:  Donut worry, it's just a joke!   ME:  Wow, Carl!  That was  a joke!  That was funny!   SCOTT:  Yeah, that actually made sense.   CARL:  I am going to tell you a lot of jokes!   ME:  Ok.   CARL:  Knock, knock.   ME:  Who's there?   CARL:  Cheerio.   ME:  Cheerio who?   CARL:  Cheerio worry, it's just a joke!